31893438940 has 36 divisors (see below), whose sum is σ = 73618497288. Its totient is φ = 11597613280.

The previous prime is 31893438919. The next prime is 31893438977. The reversal of 31893438940 is 4983439813.

It is a congruent number.

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, 6587134 + ... + 6591973.

It is an arithmetic number, because the mean of its divisors is an integer number (2044958258).

Almost surely, 2^31893438940 is an apocalyptic number.

It is an amenable number.

31893438940 is an abundant number, since it is smaller than the sum of its proper divisors (41725058348).

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

31893438940 is a wasteful number, since it uses less digits than its factorization.

31893438940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13179138 (or 13179125 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 52.

The spelling of 31893438940 in words is "thirty-one billion, eight hundred ninety-three million, four hundred thirty-eight thousand, nine hundred forty".