31039164 has 72 divisors (see below), whose sum is σ = 87447360. Its totient is φ = 9217152.

The previous prime is 31039159. The next prime is 31039171. The reversal of 31039164 is 46193013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12429 + ... + 14715.

Almost surely, 2^31039164 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 31039164, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43723680).

31039164 is an abundant number, since it is smaller than the sum of its proper divisors (56408196).

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

31039164 is a wasteful number, since it uses less digits than its factorization.

31039164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2339 (or 2334 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 31039164 is about 5571.2802837409. The cubic root of 31039164 is about 314.2702988504.

The spelling of 31039164 in words is "thirty-one million, thirty-nine thousand, one hundred sixty-four".