Nominal | 28 |

Cardinal | twenty-eight |

Ordinal | 28th |

Number of digits | 2 |

Sum of digits | 10 |

Product of digits | 16 |

Number parity | Even |

Calculation was done in 0.0000391006 seconds

Prime factorization | 2 x 2 x 7 |

Prime factorization in exponent form | 2^{2} x 7 |

Prime factors | 2, 7 |

Number of distinct prime factors ω(n) | 2 |

Total number of prime factors Ω(n) | 3 |

Sum of prime factors | 9 |

Product of prime factors | 14 |

Calculation was done in 0.0000100136 seconds

Calculation was done in 0.0000228882 seconds

Is 28 a prime number? | No |

Is 28 a semiprime number? | No |

Is 28 a Chen prime number? | No |

Is 28 a Mersenne prime number? | No |

Calculation was done in 0.0000121593 seconds

Is 28 a Catalan number? | No |

Is 28 a Fibonacci number? | No |

Is 28 a Idoneal number? | Yes: I_{19} |

Calculation was done in 0.0000040531 seconds

Calculation was done in 0.0015709400 seconds

Calculation was done in 0.0000169277 seconds

Calculation was done in 0.0000050068 seconds

Sine of 28 | 0.27090578830787 |

Cosecant of 28 | 3.6913201679676 |

Cosine of 28 | -0.96260586631357 |

Secant of 28 | -1.0388467751912 |

Tangent of 28 | -0.28142960456427 |

Cotangent of 28 | -3.5532864481272 |

Calculation was done in 0.0000090599 seconds

Yes, the number 28 is an even number.

No

Calculation was done in 0.0000040531 seconds

The spelling of 28 in words is "twenty-eight", meaning that: |

28 is an aban number (a number without the letter a) |

28 is not an eban number (as it contains the letter e) |

28 is not an iban number (as it contains the letter i) |

28 is an oban number (a number without the letter o) |

28 is not a tban number (as it contains the letter t) |

28 is an uban number (a number without the letter u) |

Calculation was done in 0.0000019073 seconds

Bengali numerals | ২৮ |

Eastern Arabic numerals | ٢٨ |

Hieroglyphs numeralsused in Ancient Egypt | 𓎇𓐁 |

Khmer numerals | ២៨ |

Japanese numerals | 二十八 |

Roman numerals | XXVIII |

Thai numerals | ๒๘ |

Calculation was done in 0.0000710487 seconds

Arabic | ثمانية و عشرون |

Croatian | dvadeset i osam |

Czech | dvacet osm |

Danish | otte og tyve |

Dutch | achtentwintig |

Estonian | blaeve vɔ enyi |

Faroese | tjúgoátta |

Filipino | dalawáng pû’t waló |

Finnish | kaksikymmentäkahdeksan |

French | vingt-huit |

Greek | είκοσι οκτώ |

German | achtundzwanzig |

Hebrew | עשרים ושמונה |

Hindi | अट्ठाईस |

Hungarian | huszonnyolc |

Icelandic | tuttugu og átta |

Indonesian | dua puluh delapan |

Italian | ventotto |

Japanese | 二十八 |

Korean | 이십팔 |

Latvian | divdesmit astoņi |

Lithuanian | dvidešimt aštuoni |

Norwegian | tjueåtte |

Persian | بیست و هشت |

Polish | dwadzieścia osiem |

Portuguese | vinte e oito |

Romanian | douăzeci şi opt |

Russian | двадцать восемь |

Serbian | двадесет и осам |

Slovak | dvadsaťosem |

Slovene | dvaset osem |

Spanish | veintiocho |

Swahili | ishirini na nane |

Swedish | tjugoåtta |

Thai | ยี่สิบแปด |

Turkish | yirmi sekiz |

Ukrainian | двадцять вісім |

Vietnamese | hai mươi tám |

Calculation was done in 0.0140550137 seconds

Number 28 reversed | 82 | |

ASCII Code | 28 | |

Unicode Character | U+001C | |

Unix Timestamp | Thu, 01 Jan 1970 00:00:28 +0000 |

Calculation was done in 0.0000219345 seconds

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