317420640 has 96 divisors (see below), whose sum is σ = 1110987360. Its totient is φ = 84644352.

The previous prime is 317420639. The next prime is 317420681. The reversal of 317420640 is 46024713.

317420640 is a `hidden beast` number, since 3 + 17 + 4 + 2 + 0 + 640 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 32419 + ... + 41058.

It is an arithmetic number, because the mean of its divisors is an integer number (11572785).

Almost surely, 2^317420640 is an apocalyptic number.

317420640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

317420640 is an abundant number, since it is smaller than the sum of its proper divisors (793566720).

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

317420640 is a wasteful number, since it uses less digits than its factorization.

317420640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73501 (or 73487 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 317420640 is about 17816.3026467334. The cubic root of 317420640 is about 682.1476505137.

The spelling of 317420640 in words is "three hundred seventeen million, four hundred twenty thousand, six hundred forty".