31680712 has 16 divisors (see below), whose sum is σ = 67887360. Its totient is φ = 13577424.

The previous prime is 31680709. The next prime is 31680721. The reversal of 31680712 is 21708613.

It is a Harshad number since it is a multiple of its sum of digits (28).

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, 282808 + ... + 282919.

It is an arithmetic number, because the mean of its divisors is an integer number (4242960).

Almost surely, 2^31680712 is an apocalyptic number.

It is an amenable number.

31680712 is an abundant number, since it is smaller than the sum of its proper divisors (36206648).

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

31680712 is a wasteful number, since it uses less digits than its factorization.

31680712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565740 (or 565736 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 31680712 is about 5628.5621609786. The cubic root of 31680712 is about 316.4207661954.

The spelling of 31680712 in words is "thirty-one million, six hundred eighty thousand, seven hundred twelve".