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← 267 268 269 →
← 260 261 262 263 264 265 266 267 268 269 → List of numbers ; Integers ; ← 0 100 200 300 400 500 600 700 800 900 →
Cardinal	two hundred sixty-eight
Ordinal	268th; (two hundred sixty-eighth)
Factorization	22 × 67
Divisors	1, 2, 4, 67, 134, 268
Greek numeral	ΣΞΗ´
Roman numeral	CCLXVIII, cclxviii
Binary	1000011002
Ternary	1002213
Senary	11246
Octal	4148
Duodecimal	1A412
Hexadecimal	10C16

268 (number)

Last updated February 02, 2026

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

In mathematics

268 is an even composite number with two prime factors,^[1] 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^[2]
268 is the sum of the consecutive primes 131 and 137.^[3]

References

↑ "Facts about the integer". mathworld.wolfram.com.
↑ "Untouchable numbers". mathworld.wolfram.com.
↑ "Twin prime numbers". mathworld.wolfram.com.

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[1] "Facts about the integer". mathworld.wolfram.com.

[2] "Untouchable numbers". mathworld.wolfram.com.

[3] "Twin prime numbers". mathworld.wolfram.com.

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[2]

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