31620952 has 64 divisors (see below), whose sum is σ = 71539200. Its totient is φ = 12925440.

The previous prime is 31620947. The next prime is 31620973. The reversal of 31620952 is 25902613.

It is a self number, because there is not a number n which added to its sum of digits gives 31620952.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33949 + ... + 34867.

It is an arithmetic number, because the mean of its divisors is an integer number (1117800).

Almost surely, 2^31620952 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 31620952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35769600).

31620952 is an abundant number, since it is smaller than the sum of its proper divisors (39918248).

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

31620952 is a wasteful number, since it uses less digits than its factorization.

31620952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 976 (or 972 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 31620952 is about 5623.2510169830. The cubic root of 31620952 is about 316.2216838942.

The spelling of 31620952 in words is "thirty-one million, six hundred twenty thousand, nine hundred fifty-two".