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# 78

Number 78 (seventy-eight) is an even two-digits composite number and natural number following 77 and preceding 79.

## Properties of the number 78

 Nominal 78 Cardinal seventy-eight Ordinal 78th Number of digits 2 Sum of digits 15 Product of digits 56 Number parity Even
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## Prime Factorization of 78

 Prime factorization 2 x 3 x 13 Prime factors 2, 3, 13 Number of distinct prime factors ω(n) 3 Total number of prime factors Ω(n) 3 Sum of prime factors 18 Product of prime factors 78
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## Divisors of 78

 List of proper divisors 1, 2, 3, 6, 13, 26, 39 List of all dividers 1, 2, 3, 6, 13, 26, 39, 78 Number of divisors d(n) 8 Sum of all divisors σ(n) 168 Aliquot sum 90 78 is an abundant number , because the sum of its proper divisors (90) is greater than itself. Its abundance is 12.
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## Prime numbers

 Is 78 a prime number? No Is 78 a semiprime number? No Is 78 a Chen prime number? No Is 78 a Mersenne prime number? No
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## Sequences

 Is 78 a Catalan number? No Is 78 a Fibonacci number? No Is 78 a Idoneal number? Yes: I32
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## Number theory

Number theory is a branch of pure mathematics devoted primarily to the study of the integers and integer-valued functions.
 78 is not a Happy number 78 is not a Humble number 78 is not a Münchhausen number 78 is not a Perfect number 78 is not a Perfect square 78 is not a Palindrome
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## Numeric Bases of 78

In mathematics, a base or radix of a numeral system is the number of unique digits, including zero, used to represent numbers in that system.
BaseSystemValue
2Binary10011102
3Ternary22203
4Quaternary10324
5Quinary3035
6Senary2106
7Septenary1417
8Octal1168
9Nonary869
10Decimal78
12Duodecimal6612
20Vigesimal3i20
36Base362636
60Sexagesimal1I60
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## Mathematical operations

Mathematical operations are actions that are performed on numbers or mathematical expressions to find a numerical result.
 Square of 78 (n2) 6084 Cube of 78 (n3) 474552 Square root of 78 8.83176 Natural Logarithm (ln) of 78 4.35671 Decimal Logarithm (log) of 78 1.89209
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## Trigonometry

Trigonometry is the study of the relationship between the angles and sides of a triangle.
 Sine of 78 0.513978 Cosecant of 78 1.94561 Cosine of 78 -0.857803 Secant of 78 -1.16577 Tangent of 78 -0.59918 Cotangent of 78 -1.66895
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## Number parity

Parity is the property of an integer of whether it is even or odd.

### Is 78 an Even Number?

Yes, the number 78 is an even number.

### Is 78 an Odd Number?

No
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## Ban number

In recreational mathematics, a ban number is a number that does not contain a particular letter when spelled out in English; in other words, the letter is "banned".
 The spelling of 78 in words is "seventy-eight", meaning that: 78 is an aban number (a number without the letter a) 78 is not an eban number (as it contains the letter e) 78 is not an iban number (as it contains the letter i) 78 is an oban number (a number without the letter o) 78 is not a tban number (as it contains the letter t) 78 is an uban number (a number without the letter u)
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## Numeral systems

How to write 78 in other number systems?
 Bengali numerals ৭৮ Eastern Arabic numerals ٧٨ Hieroglyphs numeralsused in Ancient Egypt 𓎌𓐁 Khmer numerals ៧៨ Japanese numerals 七十八 Roman numerals LXXVIII Thai numerals ๗๘
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## Translation

How do you say 78 in 38 different languages?
 Arabic ثمانية و سبعون Croatian sedamdeset i osam Czech sedmdesát osm Danish otte og halvfjerds Dutch achtenzeventig Estonian blaadre vɔ enyi Faroese sjeyti­átta Filipino pitóng pû’t waló Finnish seitsemän­kymmentä­kahdeksan French soixante-dix-huit Greek εβδομήντα οκτώ German acht­und­siebzig Hebrew שבעים ושמונה Hindi अठहत्तर Hungarian hetven­nyolc Icelandic sjötíu og átta Indonesian tujuh puluh delapan Italian settantotto Japanese 七十八 Korean 칠십팔 Latvian septiņdesmit astoņi Lithuanian septyniasdešimt aštuoni Norwegian sytti­åtte Persian هفتاد و هشت Polish siedemdziesiąt osiem Portuguese setenta e oito Romanian şaptezeci şi opt Russian семьдесят восемь Serbian седамдесет и осам Slovak sedemdesiat­osem Slovene sedemdeset osem Spanish setenta y ocho Swahili sabini na nane Swedish sjutioåtta Thai เจ็ด​สิบ​แปด Turkish yetmiş sekiz Ukrainian сімдесят вісім Vietnamese bảy mươi tám
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## Miscellaneous

 Number 78 reversed 87 ASCII Code 78 N Unicode Character U+004E N Unix Timestamp Thu, 01 Jan 1970 00:01:18 +0000
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