31938889444 has 36 divisors (see below), whose sum is σ = 70212772672. Its totient is φ = 12443721840.

The previous prime is 31938889429. The next prime is 31938889459. The reversal of 31938889444 is 44498883913.

It is an interprime number because it is at equal distance from previous prime (31938889429) and next prime (31938889459).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4710144 + ... + 4716919.

Almost surely, 2^31938889444 is an apocalyptic number.

It is an amenable number.

31938889444 is an abundant number, since it is smaller than the sum of its proper divisors (38273883228).

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

31938889444 is a wasteful number, since it uses less digits than its factorization.

31938889444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9427096 (or 9427083 counting only the distinct ones).

The product of its digits is 23887872, while the sum is 61.

The spelling of 31938889444 in words is "thirty-one billion, nine hundred thirty-eight million, eight hundred eighty-nine thousand, four hundred forty-four".