12931864 has 16 divisors (see below), whose sum is σ = 26451720. Its totient is φ = 5878080.

The previous prime is 12931861. The next prime is 12931879. The reversal of 12931864 is 46813921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12931861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73389 + ... + 73564.

Almost surely, 2^12931864 is an apocalyptic number.

It is an amenable number.

12931864 is an abundant number, since it is smaller than the sum of its proper divisors (13519856).

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

12931864 is a wasteful number, since it uses less digits than its factorization.

12931864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146970 (or 146966 counting only the distinct ones).

The product of its digits is 10368, while the sum is 34.

The square root of 12931864 is about 3596.0900989825. The cubic root of 12931864 is about 234.7219527252.

The spelling of 12931864 in words is "twelve million, nine hundred thirty-one thousand, eight hundred sixty-four".