31990762228 has 24 divisors (see below), whose sum is σ = 57921292800. Its totient is φ = 15441954528.

The previous prime is 31990762207. The next prime is 31990762229. The reversal of 31990762228 is 82226709913.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31990762229) 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 7 ways as a sum of consecutive naturals, for example, 1834213 + ... + 1851571.

It is an arithmetic number, because the mean of its divisors is an integer number (2413387200).

Almost surely, 2^31990762228 is an apocalyptic number.

It is an amenable number.

31990762228 is a deficient number, since it is larger than the sum of its proper divisors (25930530572).

31990762228 is a wasteful number, since it uses less digits than its factorization.

31990762228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33279 (or 33277 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 49.

The spelling of 31990762228 in words is "thirty-one billion, nine hundred ninety million, seven hundred sixty-two thousand, two hundred twenty-eight".