304 (number)
From Wikipedia, the free encyclopedia
Natural number
| Cardinal | three hundred four |
|---|---|
| Ordinal | 304th (three hundred fourth) |
| Factorization | 24 ×ばつ 19 |
| Divisors | 1, 2, 4, 8, 16, 19, 38, 76, 152, 304 |
| Greek numeral | ΤΔ ́ |
| Roman numeral | CCCIV, ccciv |
| Binary | 1001100002 |
| Ternary | 1020213 |
| Senary | 12246 |
| Octal | 4608 |
| Duodecimal | 21412 |
| Hexadecimal | 13016 |
304 is the natural number following 303 and preceding 305.
In mathematics
[edit ]- 304 is an even composite number with two prime factors.[1]
- 304 is the sum of consecutive primes in two different ways:[2] It is the sum of 41+43+47+53+59+61 and of 23+29+31+37+41+43+47+53.
- 304 is a primitive semiperfect number meaning that it is a semiperfect number that is not divisible by any other semiperfect number.[3]
- 304 is an untouchable number meaning that it is not equal to the sum of any number’s proper divisors.[4]
- 304 is a nontotient number meaning that it is an even number where phi(x) cannot result in that number.[5]
References
[edit ]- ^ "Facts about the integer". mathworld.wolfram.com.
- ^ Sloane, N. J. A. (ed.). "Sequence A067372 (Integers expressible as the sum of (at least two) consecutive primes in at least 2 ways)". The On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
- ^ Sloane, N. J. A. (ed.). "Sequence A006036 (Primitive pseudoperfect numbers)". The On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
- ^ Sloane, N. J. A. (ed.). "Sequence A005114 (Untouchable numbers, also called non aliquot numbers: impossible values for the sum of aliquot parts function (A001065))". The On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
- ^ Sloane, N. J. A. (ed.). "Sequence A005277 (Nontotients: even numbers k such that phi(m) = k has no solution)". The On-Line Encyclopedia of Integer Sequences . OEIS Foundation.
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