315688 has 8 divisors (see below), whose sum is σ = 591930. Its totient is φ = 157840.

The previous prime is 315677. The next prime is 315691. The reversal of 315688 is 886513.

It can be written as a sum of positive squares in only one way, i.e., 289444 + 26244 = 538^2 + 162^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19723 + ... + 19738.

2³¹⁵⁶⁸⁸ is an apocalyptic number.

It is an amenable number.

315688 is a deficient number, since it is larger than the sum of its proper divisors (276242).

315688 is a wasteful number, since it uses less digits than its factorization.

315688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39467 (or 39463 counting only the distinct ones).

The product of its digits is 5760, while the sum is 31.

The square root of 315688 is about 561.8611928226. The cubic root of 315688 is about 68.0904218091.

The spelling of 315688 in words is "three hundred fifteen thousand, six hundred eighty-eight".