317912656 has 40 divisors (see below), whose sum is σ = 630662760. Its totient is φ = 155191296.

The previous prime is 317912633. The next prime is 317912681. The reversal of 317912656 is 656219713.

It can be written as a sum of positive squares in 4 ways, for example, as 121352256 + 196560400 = 11016^2 + 14020^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 196780 + ... + 198388.

It is an arithmetic number, because the mean of its divisors is an integer number (15766569).

Almost surely, 2^317912656 is an apocalyptic number.

It is an amenable number.

317912656 is a deficient number, since it is larger than the sum of its proper divisors (312750104).

317912656 is a wasteful number, since it uses less digits than its factorization.

317912656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1903 (or 1897 counting only the distinct ones).

The product of its digits is 68040, while the sum is 40.

The square root of 317912656 is about 17830.1053277876. The cubic root of 317912656 is about 682.4999215518.

The spelling of 317912656 in words is "three hundred seventeen million, nine hundred twelve thousand, six hundred fifty-six".