317972560 has 20 divisors (see below), whose sum is σ = 739286388. Its totient is φ = 127188992.

The previous prime is 317972533. The next prime is 317972579. The reversal of 317972560 is 65279713.

It can be written as a sum of positive squares in 2 ways, for example, as 172239376 + 145733184 = 13124^2 + 12072^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×317972560² = 202213097825907200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1987249 + ... + 1987408.

Almost surely, 2^317972560 is an apocalyptic number.

It is an amenable number.

317972560 is an abundant number, since it is smaller than the sum of its proper divisors (421313828).

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

317972560 is a wasteful number, since it uses less digits than its factorization.

317972560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3974670 (or 3974664 counting only the distinct ones).

The product of its (nonzero) digits is 79380, while the sum is 40.

The square root of 317972560 is about 17831.7851041336. The cubic root of 317972560 is about 682.5427864780.

The spelling of 317972560 in words is "three hundred seventeen million, nine hundred seventy-two thousand, five hundred sixty".