31539964 has 12 divisors (see below), whose sum is σ = 58441824. Its totient is φ = 14842304.

The previous prime is 31539931. The next prime is 31539967. The reversal of 31539964 is 46993513.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31539967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 231844 + ... + 231979.

It is an arithmetic number, because the mean of its divisors is an integer number (4870152).

Almost surely, 2^31539964 is an apocalyptic number.

31539964 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

31539964 is a deficient number, since it is larger than the sum of its proper divisors (26901860).

31539964 is a wasteful number, since it uses less digits than its factorization.

31539964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463844 (or 463842 counting only the distinct ones).

The product of its digits is 87480, while the sum is 40.

The square root of 31539964 is about 5616.0452277381. The cubic root of 31539964 is about 315.9514826970.

The spelling of 31539964 in words is "thirty-one million, five hundred thirty-nine thousand, nine hundred sixty-four".