31678464 has 56 divisors (see below), whose sum is σ = 84536280. Its totient is φ = 10551296.

The previous prime is 31678433. The next prime is 31678477. The reversal of 31678464 is 46487613.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23932 + ... + 25220.

Almost surely, 2^31678464 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 31678464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42268140).

31678464 is an abundant number, since it is smaller than the sum of its proper divisors (52857816).

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

31678464 is an equidigital number, since it uses as much as digits as its factorization.

31678464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1318 (or 1294 counting only the distinct ones).

The product of its digits is 96768, while the sum is 39.

The square root of 31678464 is about 5628.3624616757. The cubic root of 31678464 is about 316.4132818233.

The spelling of 31678464 in words is "thirty-one million, six hundred seventy-eight thousand, four hundred sixty-four".