31382680 has 128 divisors (see below), whose sum is σ = 90201600. Its totient is φ = 9566208.

The previous prime is 31382677. The next prime is 31382693. The reversal of 31382680 is 8628313.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 90267 + ... + 90613.

It is an arithmetic number, because the mean of its divisors is an integer number (704700).

Almost surely, 2^31382680 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 31382680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45100800).

31382680 is an abundant number, since it is smaller than the sum of its proper divisors (58818920).

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

31382680 is a wasteful number, since it uses less digits than its factorization.

31382680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401 (or 397 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 31382680 is about 5602.0246340051. The cubic root of 31382680 is about 315.4254099368.

The spelling of 31382680 in words is "thirty-one million, three hundred eighty-two thousand, six hundred eighty".