31631286828 has 48 divisors (see below), whose sum is σ = 76496641760. Its totient is φ = 10164662784.

The previous prime is 31631286823. The next prime is 31631286829. The reversal of 31631286828 is 82868213613.

It is not an unprimeable number, because it can be changed into a prime (31631286823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 278401 + ... + 375192.

Almost surely, 2^31631286828 is an apocalyptic number.

It is an amenable number.

31631286828 is an abundant number, since it is smaller than the sum of its proper divisors (44865354932).

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

31631286828 is a wasteful number, since it uses less digits than its factorization.

31631286828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 653746 (or 653744 counting only the distinct ones).

The product of its digits is 663552, while the sum is 48.

The spelling of 31631286828 in words is "thirty-one billion, six hundred thirty-one million, two hundred eighty-six thousand, eight hundred twenty-eight".