317398640 has 80 divisors (see below), whose sum is σ = 804511008. Its totient is φ = 115749888.

The previous prime is 317398639. The next prime is 317398651. The reversal of 317398640 is 46893713.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84482 + ... + 88158.

Almost surely, 2^317398640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 317398640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (402255504).

317398640 is an abundant number, since it is smaller than the sum of its proper divisors (487112368).

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

317398640 is a wasteful number, since it uses less digits than its factorization.

317398640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3786 (or 3780 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 317398640 is about 17815.6852239817. The cubic root of 317398640 is about 682.1318905692.

The spelling of 317398640 in words is "three hundred seventeen million, three hundred ninety-eight thousand, six hundred forty".