31252986 has 64 divisors (see below), whose sum is σ = 74188800. Its totient is φ = 9723888.

The previous prime is 31252961. The next prime is 31253009. The reversal of 31252986 is 68925213.

Its product of digits (25920) is a multiple of the sum of its prime factors (480).

It is a self number, because there is not a number n which added to its sum of digits gives 31252986.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 84975 + ... + 85341.

It is an arithmetic number, because the mean of its divisors is an integer number (1159200).

Almost surely, 2^31252986 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31252986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37094400).

31252986 is an abundant number, since it is smaller than the sum of its proper divisors (42935814).

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

31252986 is a wasteful number, since it uses less digits than its factorization.

31252986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480 (or 474 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 31252986 is about 5590.4370133291. The cubic root of 31252986 is about 314.9902944855.

The spelling of 31252986 in words is "thirty-one million, two hundred fifty-two thousand, nine hundred eighty-six".