31880033240 has 64 divisors (see below), whose sum is σ = 80365923360. Its totient is φ = 11279416320.

The previous prime is 31880033231. The next prime is 31880033261. The reversal of 31880033240 is 4233008813.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 31880033197 and 31880033206.

It is a congruent number.

It is an unprimeable number.

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, 962837 + ... + 995396.

Almost surely, 2^31880033240 is an apocalyptic number.

It is an amenable number.

31880033240 is an abundant number, since it is smaller than the sum of its proper divisors (48485890120).

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

31880033240 is a wasteful number, since it uses less digits than its factorization.

31880033240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1958292 (or 1958288 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The spelling of 31880033240 in words is "thirty-one billion, eight hundred eighty million, thirty-three thousand, two hundred forty".