31884380032 has 32 divisors (see below), whose sum is σ = 64102440600. Its totient is φ = 15795924480.

The previous prime is 31884380027. The next prime is 31884380071. The reversal of 31884380032 is 23008348813.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×31884380032² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1128694 + ... + 1156597.

Almost surely, 2^31884380032 is an apocalyptic number.

31884380032 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31884380032 is an abundant number, since it is smaller than the sum of its proper divisors (32218060568).

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

31884380032 is a wasteful number, since it uses less digits than its factorization.

31884380032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2285414 (or 2285402 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 40.

The spelling of 31884380032 in words is "thirty-one billion, eight hundred eighty-four million, three hundred eighty thousand, thirty-two".