258 (number)

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

← 257 258 259 →
← 200 210 220 230 240 250 260 270 280 290 → List of numbers — Integers ← 0 100 200 300 400 500 600 700 800 900 →
Cardinal	two hundred fifty-eight
Ordinal	258th (two hundred and fifty-eighth)
Factorization	2 × 3 × 43
Divisors	1, 2, 3, 6, 43, 86, 129, 258
Roman numeral	CCLVIII
Binary	1000000102
Ternary	1001203
Quaternary	100024
Quinary	20135
Senary	11106
Octal	4028
Duodecimal	19612
Hexadecimal	10216
Vigesimal	CI20
Base 36	7636

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.