258 (number)

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258 (two hundred [and] fifty-eight) is the natural number following 257 and preceding 259.

← 257 258 259 →
List of numbers — Integers
← 0 100 200 300 400 500 600 700 800 900 →
Cardinaltwo hundred fifty-eight
Ordinal258th
(two hundred fifty-eighth)
Factorization2 × 3 × 43
Divisors1, 2, 3, 6, 43, 86, 129, 258
Greek numeralΣΝΗ´
Roman numeralCCLVIII
Binary1000000102
Ternary1001203
Octal4028
Duodecimal19612
Hexadecimal10216

In mathematics[]

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[]

  1. ^ "Sloane's A007304 : Sphenic numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-04-21.
  2. ^ "Sloane's A005277 : Nontotients". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-04-20.
  3. ^ "Sloane's A002858 : Ulam numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-04-21.
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