305 (number)
From HandWiki
Short description: Natural number
| ||||
|---|---|---|---|---|
| Cardinal | three hundred five | |||
| Ordinal | 305th (three hundred fifth) | |||
| Factorization | 5 × 61 | |||
| Divisors | 1, 5, 61, 305 | |||
| Greek numeral | ΤΕ´ | |||
| Roman numeral | CCCV | |||
| Binary | 1001100012 | |||
| Ternary | 1020223 | |||
| Quaternary | 103014 | |||
| Quinary | 22105 | |||
| Senary | 12256 | |||
| Octal | 4618 | |||
| Duodecimal | 21512 | |||
| Hexadecimal | 13116 | |||
| Vigesimal | F520 | |||
| Base 36 | 8H36 | |||
305 is the natural number following 304 and preceding 306.
In mathematics
- 305 is an odd composite number with two prime factors.[1]
- 305 is the convolution of the first 7 primes with themselves.[2]
- 305 is the fifth hexagonal prism number which is defined by (n+1)(3n2+3n+1).[3]
- 305 is the hypotenuse of two Pythagorean triples. 3052=2072+2242=1362+2732.[4][5]
Other fields
- The calendar years 305 AD and 305 BC.
- 305 is the number for several highways across the countries of Canada , China , India , Japan , the Philippines , and the United States .
References
- ↑ "Facts about the integer". https://mathworld.wolfram.com/CompositeNumber.html.
- ↑ Sloane, N. J. A., ed. "Sequence A014342 (Convolution of primes with themselves)". OEIS Foundation. https://oeis.org/A014342.
- ↑ Sloane, N. J. A., ed. "Sequence A005915". OEIS Foundation. https://oeis.org/A005915.
- ↑ "Pythagorean triples". https://mathworld.wolfram.com/PythagoreanTriple.html.
- ↑ Tobin-Campbell, Christopher. "Systems of Pythagorean Triples". https://www.whitman.edu/documents/Academics/Mathematics/SeniorProject_ChrisTobin-Campbell.pdf.
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