31988980 has 12 divisors (see below), whose sum is σ = 67176900. Its totient is φ = 12795584.

The previous prime is 31988963. The next prime is 31988981. The reversal of 31988980 is 8988913.

It can be written as a sum of positive squares in 2 ways, for example, as 13704804 + 18284176 = 3702^2 + 4276^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 31988980.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31988981) 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, 799705 + ... + 799744.

It is an arithmetic number, because the mean of its divisors is an integer number (5598075).

Almost surely, 2^31988980 is an apocalyptic number.

It is an amenable number.

31988980 is an abundant number, since it is smaller than the sum of its proper divisors (35187920).

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

31988980 is a wasteful number, since it uses less digits than its factorization.

31988980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1599458 (or 1599456 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 46.

The square root of 31988980 is about 5655.8801260281. The cubic root of 31988980 is about 317.4437621269.

The spelling of 31988980 in words is "thirty-one million, nine hundred eighty-eight thousand, nine hundred eighty".