82 (number)
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Short description: Natural number
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Cardinal | eighty-two | |||
Ordinal | 82nd (eighty-second) | |||
Factorization | 2 × 41 | |||
Divisors | 1, 2, 41, 82 | |||
Greek numeral | ΠΒ´ | |||
Roman numeral | LXXXII | |||
Binary | 10100102 | |||
Ternary | 100013 | |||
Quaternary | 11024 | |||
Quinary | 3125 | |||
Senary | 2146 | |||
Octal | 1228 | |||
Duodecimal | 6A12 | |||
Hexadecimal | 5216 | |||
Vigesimal | 4220 | |||
Base 36 | 2A36 |
82 (eighty-two) is the natural number following 81 and preceding 83.
In mathematics
82 is:
- the twenty-seventh semiprime[1] and the thirteenth of the form (2.q).
- with an aliquot sum of 44, within an aliquot sequence of four composite numbers (82,44,40,50,43,1,0) to the Prime in the 43-aliquot tree.
- a companion Pell number.[2]
- a happy number.[3]
- palindromic in bases 3 (100013), 9 (1019) and 40 (2240).
In science
- The atomic number of lead.
- The sixth magic number.
- Messier 82, a starburst galaxy in the constellation Ursa Major.
- The New General Catalogue object NGC 82, a single star in the constellation Andromeda.
In other fields
Eighty-two is also:
- The model number of: Mark 82 bomb, a nonguided general-purpose bomb.
- The number of the French department Tarn-et-Garonne.
- The code for international direct dial phone calls to South Korea .
- The ISBN Group Identifier for books published in Norway .
- Title of Dennis Smith's book about firefighters, Report from Engine Co. 82.
- The year AD 82, 82 BC, or 1982, stylized as '82.
- The number of Trip Murphy's (Matt Dillon) car in Herbie: Fully Loaded (2005).
- The second studio album by African electropop outfit Just a Band (2009).
- The number (*82) to unblock your caller ID for phones that block anonymous incoming calls.
- The very significant number that appears at the end of Kurt Vonnegut's book Hocus Pocus.
In sports
- Both the NBA and NHL operate 82-game regular seasons.
- In Major League Baseball, the number of games a team must win to secure a winning season.
References
- ↑ Sloane, N. J. A., ed. "Sequence A001358". OEIS Foundation. https://oeis.org/A001358.
- ↑ "Sloane's A002203 : Companion Pell numbers". OEIS Foundation. https://oeis.org/A002203.
- ↑ "Sloane's A007770 : Happy numbers". OEIS Foundation. https://oeis.org/A007770.
Original source: https://en.wikipedia.org/wiki/82 (number).
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