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317993118 = 23149355697
BaseRepresentation
bin10010111101000…
…011000010011110
3211011100201112220
4102331003002132
51122401234433
651315410210
710610616432
oct2275030236
9734321486
10317993118
11153553a33
128a5b3966
1350b5a911
14303389c2
151cdb52b3
hex12f4309e

317993118 has 16 divisors (see below), whose sum is σ = 640256400. Its totient is φ = 105286016.

The previous prime is 317993113. The next prime is 317993119. The reversal of 317993118 is 811399713.

It is a super-2 number, since 2×3179931182 = 202239246190723848, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 317993118.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (317993111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 176955 + ... + 178742.

It is an arithmetic number, because the mean of its divisors is an integer number (40016025).

Almost surely, 2317993118 is an apocalyptic number.

317993118 is an abundant number, since it is smaller than the sum of its proper divisors (322263282).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

317993118 is a wasteful number, since it uses less digits than its factorization.

317993118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355851.

The product of its digits is 40824, while the sum is 42.

The square root of 317993118 is about 17832.3615373848. The cubic root of 317993118 is about 682.5574957265.

The spelling of 317993118 in words is "three hundred seventeen million, nine hundred ninety-three thousand, one hundred eighteen".

Divisors: 1 2 3 6 149 298 447 894 355697 711394 1067091 2134182 52998853 105997706 158996559 317993118