82 (number)
82 (eighty-two) is the natural number following 81 and preceding 83.
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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 | |||
| Octal | 1228 | |||
| Duodecimal | 6A12 | |||
| Hexadecimal | 5216 | |||
In mathematics
82 is:
- the twenty-third semiprime and the twelfth of the form (2×q).
- a companion Pell number.[1]
- a happy number.[2]
- palindromic in bases 3 (100013), 9 (1019) and 40 (2240).
In astronomy
- 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 atomic number of lead.
- In physics, the sixth Magic Number.
- 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.
- 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's A002203 : Companion Pell numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-29.
- "Sloane's A007770 : Happy numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-29.
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