31986332 has 24 divisors (see below), whose sum is σ = 64637664. Its totient is φ = 13565952.

The previous prime is 31986301. The next prime is 31986371. The reversal of 31986332 is 23368913.

It is a junction number, because it is equal to n+sod(n) for n = 31986292 and 31986301.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3173 + ... + 8604.

It is an arithmetic number, because the mean of its divisors is an integer number (2693236).

Almost surely, 2^31986332 is an apocalyptic number.

It is an amenable number.

31986332 is an abundant number, since it is smaller than the sum of its proper divisors (32651332).

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

31986332 is a wasteful number, since it uses less digits than its factorization.

31986332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11885 (or 11883 counting only the distinct ones).

The product of its digits is 23328, while the sum is 35.

The square root of 31986332 is about 5655.6460285276. The cubic root of 31986332 is about 317.4350027116.

The spelling of 31986332 in words is "thirty-one million, nine hundred eighty-six thousand, three hundred thirty-two".