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268 (number)

From Wikipedia, the free encyclopedia

Natural number

268

←260 261 262 263 264 265 266 267 268 269 →

←0 100 200 300 400 500 600 700 800 900 →

two hundred sixty-eight

268th
(two hundred sixty-eighth)

2² × 67

1, 2, 4, 67, 134, 268

ΣΞΗ´

CCLXVIII,cclxviii

100001100₂

100221₃

1124₆

414₈

1A4₁₂

10C₁₆

268 (two hundred [and] sixty-eight) is thenatural number following267 and preceding269.

In mathematics

268 is an evencomposite number with two prime factors,^[1] but one of the prime factors is repeated: 268 = 67*2*2.
268 is the smallest number whoseproduct of digits is 6 times thesum of its digits.
268 isuntouchable which means that it is not the sum of theproper divisors of any number^[2]
268 is the sum of the consecutiveprimes 131 and137.^[3]

References

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

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