258 (number)
258 (two hundred [and] fifty-eight) is the natural number following 257 and preceding 259.
| ||||
|---|---|---|---|---|
| Cardinal | two hundred fifty-eight | |||
| Ordinal | 258th (two hundred fifty-eighth) | |||
| Factorization | 2 × 3 × 43 | |||
| Divisors | 1, 2, 3, 6, 43, 86, 129, 258 | |||
| Greek numeral | ΣΝΗ´ | |||
| Roman numeral | CCLVIII | |||
| Binary | 1000000102 | |||
| Ternary | 1001203 | |||
| Senary | 11106 | |||
| Octal | 4028 | |||
| Duodecimal | 19612 | |||
| Hexadecimal | 10216 | |||
In mathematics
[edit]258 is:
- a sphenic number[1]
- a nontotient[2]
- the sum of four consecutive prime numbers because 258 = 59 + 61 + 67 + 71
- 63 + 62 + 6
- an Ulam number[3]
References
[edit]- ^ "Sloane's A007304 : Sphenic numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-04-21.
- ^ "Sloane's A005277 : Nontotients". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-04-20.
- ^ "Sloane's A002858 : Ulam numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-04-21.