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90

Number 90 (ninety) is an even two-digits composite number and natural number following 89 and preceding 91.

Properties of the number 90

Nominal90
Cardinalninety
Ordinal90th
Number of digits2
Sum of digits9
Product of digits0
Number parityEven
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Prime Factorization of 90

Prime factorization2 x 3 x 3 x 5
Prime factorization in exponent form2 x 32 x 5
Prime factors2, 3, 5
Number of distinct prime factors ω(n)3
Total number of prime factors Ω(n)4
Sum of prime factors10
Product of prime factors30
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Divisors of 90

List of proper divisors 1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45
List of all dividers1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90
Number of divisors d(n)12
Sum of all divisors σ(n)234
Aliquot sum 144
90 is an abundant number , because the sum of its proper divisors (144) is greater than itself. Its abundance is 54.
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Prime numbers

Is 90 a prime number?No
Is 90 a semiprime number?No
Is 90 a Chen prime number?No
Is 90 a Mersenne prime number?No
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Sequences

Is 90 a Catalan number?No
Is 90 a Fibonacci number?No
Is 90 a Idoneal number?No
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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.
90 is not a Happy number
90 is a Humble number
90 is not a Münchhausen number
90 is not a Perfect number
90 is not a Perfect square
90 is not a Palindrome
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Numeric Bases of 90

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
2Binary10110102
3Ternary101003
4Quaternary11224
5Quinary3305
6Senary2306
7Septenary1567
8Octal1328
9Nonary1109
10Decimal90
12Duodecimal7612
16Hexadecimal5a16
20Vigesimal4a20
36Base362i36
60Sexagesimal1U60
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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 90 (n2)8100
Cube of 90 (n3)729000
Square root of 909.4868329805051
Natural Logarithm (ln) of 904.4998096703303
Decimal Logarithm (log) of 901.9542425094393
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Trigonometry

Trigonometry is the study of the relationship between the angles and sides of a triangle.
Sine of 900.89399666360056
Cosecant of 901.1185724071637
Cosine of 90-0.44807361612917
Secant of 90-2.2317761278578
Tangent of 90-1.9952004122082
Cotangent of 90-0.50120278338015
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Number parity

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

Is 90 an Even Number?

Yes, the number 90 is an even number.

Is 90 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 90 in words is "ninety", meaning that:
90 is an aban number (a number without the letter a)
90 is not an eban number (as it contains the letter e)
90 is not an iban number (as it contains the letter i)
90 is an oban number (a number without the letter o)
90 is not a tban number (as it contains the letter t)
90 is an uban number (a number without the letter u)
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Numeral systems

How to write 90 in other number systems?
Bengali numerals৯০
Eastern Arabic numerals٩٠
Hieroglyphs numeralsused in Ancient Egypt𓎎
Khmer numerals៩០
Japanese numerals九十
Roman numeralsXC
Thai numerals๙๐
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Translation

How do you say 90 in 38 different languages?
Arabicتسعون
Croatiandevedeset
Czechdevadesát
Danish halvfems
Dutchnegentig
Estonianblaasieke
Faroeseníti
Filipinosiyám na pû
Finnishyhdeksän­kymmentä
Frenchquatre-vingt-dix
Greekεννενήντα
Germanneunzig
Hebrewתשעים
Hindiनब्बे
Hungariankilencven
Icelandicníutíu
Indonesiansembilan puluh
Italiannovanta
Japanese九十
Korean구십
Latviandeviņdesmit
Lithuaniandevyniasdešimt
Norwegiannitti
Persianنود
Polishdziewięćdziesiąt
Portuguesenoventa
Romaniannouăzeci
Russianдевяносто
Serbianдеведесет
Slovakdeväťdesiat
Slovenedevetdeset
Spanish noventa
Swahilitisini
Swedishnittio
Thaiเก้า​สิบ
Turkishdoksan
Ukrainianдевʼяносто
Vietnamesechín mươi
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Miscellaneous

Number 90 reversed09
ASCII Code90Z
Unicode CharacterU+005AZ
Unix TimestampThu, 01 Jan 1970 00:01:30 +0000
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