318031680 has 56 divisors (see below), whose sum is σ = 1009753632. Its totient is φ = 84808192.

The previous prime is 318031619. The next prime is 318031691. The reversal of 318031680 is 86130813.

It is a super-2 number, since 2×318031680² = 202288298967244800, which contains 22 as substring.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

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 7 ways as a sum of consecutive naturals, for example, 164682 + ... + 166601.

Almost surely, 2^318031680 is an apocalyptic number.

318031680 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

318031680 is an abundant number, since it is smaller than the sum of its proper divisors (691721952).

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

318031680 is a wasteful number, since it uses less digits than its factorization.

318031680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331303 (or 331293 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 318031680 is about 17833.4427410974. The cubic root of 318031680 is about 682.5850851268.

The spelling of 318031680 in words is "three hundred eighteen million, thirty-one thousand, six hundred eighty".