12731888 has 20 divisors (see below), whose sum is σ = 26566008. Its totient is φ = 5876160.

The previous prime is 12731879. The next prime is 12731891. The reversal of 12731888 is 88813721.

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, 30398 + ... + 30813.

Almost surely, 2^12731888 is an apocalyptic number.

It is an amenable number.

12731888 is an abundant number, since it is smaller than the sum of its proper divisors (13834120).

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

12731888 is a wasteful number, since it uses less digits than its factorization.

12731888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61232 (or 61226 counting only the distinct ones).

The product of its digits is 21504, while the sum is 38.

The square root of 12731888 is about 3568.1771256483. The cubic root of 12731888 is about 233.5057627955.

The spelling of 12731888 in words is "twelve million, seven hundred thirty-one thousand, eight hundred eighty-eight".