31948864 has 56 divisors (see below), whose sum is σ = 65836800. Its totient is φ = 15375360.

The previous prime is 31948859. The next prime is 31948867. The reversal of 31948864 is 46884913.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 31948864.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31948867) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 358932 + ... + 359020.

Almost surely, 2^31948864 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 31948864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32918400).

31948864 is an abundant number, since it is smaller than the sum of its proper divisors (33887936).

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

31948864 is an equidigital number, since it uses as much as digits as its factorization.

31948864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251 (or 241 counting only the distinct ones).

The product of its digits is 165888, while the sum is 43.

The square root of 31948864 is about 5652.3326158322. The cubic root of 31948864 is about 317.3110091083.

The spelling of 31948864 in words is "thirty-one million, nine hundred forty-eight thousand, eight hundred sixty-four".