13387432 has 32 divisors (see below), whose sum is σ = 26778600. Its totient is φ = 6252544.

The previous prime is 13387427. The next prime is 13387447. The reversal of 13387432 is 23478331.

It can be written as a sum of positive squares in 4 ways, for example, as 12916836 + 470596 = 3594^2 + 686^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13387394 and 13387403.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23244 + ... + 23812.

Almost surely, 2^13387432 is an apocalyptic number.

It is an amenable number.

13387432 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

13387432 is a wasteful number, since it uses less digits than its factorization.

13387432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 765 (or 761 counting only the distinct ones).

The product of its digits is 12096, while the sum is 31.

The square root of 13387432 is about 3658.8839828560. The cubic root of 13387432 is about 237.4464928399.

The spelling of 13387432 in words is "thirteen million, three hundred eighty-seven thousand, four hundred thirty-two".