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268 (number)

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Natural number
← 267 268 269 →
← 260 261 262 263 264 265 266 267 268 269 → ← 0 100 200 300 400 500 600 700 800 900 →
Cardinaltwo hundred sixty-eight
Ordinal268th
(two hundred sixty-eighth)
Factorization2 × 67
Divisors1, 2, 4, 67, 134, 268
Greek numeralΣΞΗ´
Roman numeralCCLXVIII, cclxviii
Binary1000011002
Ternary1002213
Senary11246
Octal4148
Duodecimal1A412
Hexadecimal10C16

268 (two hundred sixty-eight) is the natural number following 267 and preceding 269.

In mathematics

  • 268 is an even composite number with two prime factors, but one of the prime factors is repeated: 268 = 67*2*2.
  • 268 is the smallest number whose product of digits is 6 times the sum of its digits.
  • 268 is untouchable which means that it is not the sum of the proper divisors of any number
  • 268 is the sum of the consecutive primes 131 and 137.

References

  1. "Facts about the integer". mathworld.wolfram.com.
  2. "Untouchable numbers". mathworld.worfram.com.
  3. "Twin prime numbers". mathworld.wolfram.com.
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