31980828 has 24 divisors (see below), whose sum is σ = 81406080. Its totient is φ = 9691120.

The previous prime is 31980749. The next prime is 31980853. The reversal of 31980828 is 82808913.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121008 + ... + 121271.

It is an arithmetic number, because the mean of its divisors is an integer number (3391920).

Almost surely, 2^31980828 is an apocalyptic number.

It is an amenable number.

31980828 is an abundant number, since it is smaller than the sum of its proper divisors (49425252).

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

31980828 is a wasteful number, since it uses less digits than its factorization.

31980828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242297 (or 242295 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 39.

The square root of 31980828 is about 5655.1594141987. The cubic root of 31980828 is about 317.4167942835.

The spelling of 31980828 in words is "thirty-one million, nine hundred eighty thousand, eight hundred twenty-eight".