318681864 has 96 divisors (see below), whose sum is σ = 947812320. Its totient is φ = 99968256.

The previous prime is 318681821. The next prime is 318681871. The reversal of 318681864 is 468186813.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28227 + ... + 37869.

It is an arithmetic number, because the mean of its divisors is an integer number (9873045).

Almost surely, 2^318681864 is an apocalyptic number.

318681864 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 318681864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (473906160).

318681864 is an abundant number, since it is smaller than the sum of its proper divisors (629130456).

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

318681864 is a wasteful number, since it uses less digits than its factorization.

318681864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9681 (or 9665 counting only the distinct ones).

The product of its digits is 221184, while the sum is 45.

The square root of 318681864 is about 17851.6627796965. The cubic root of 318681864 is about 683.0499275026.

The spelling of 318681864 in words is "three hundred eighteen million, six hundred eighty-one thousand, eight hundred sixty-four".