13387872 has 24 divisors (see below), whose sum is σ = 35143416. Its totient is φ = 4462592.

The previous prime is 13387859. The next prime is 13387883. The reversal of 13387872 is 27878331.

It is a tau number, because it is divible by the number of its divisors (24).

It is a self number, because there is not a number n which added to its sum of digits gives 13387872.

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, 69633 + ... + 69824.

It is an arithmetic number, because the mean of its divisors is an integer number (1464309).

Almost surely, 2^13387872 is an apocalyptic number.

13387872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13387872 is an abundant number, since it is smaller than the sum of its proper divisors (21755544).

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

13387872 is a wasteful number, since it uses less digits than its factorization.

13387872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139470 (or 139462 counting only the distinct ones).

The product of its digits is 56448, while the sum is 39.

The square root of 13387872 is about 3658.9441099858. The cubic root of 13387872 is about 237.4490941681.

The spelling of 13387872 in words is "thirteen million, three hundred eighty-seven thousand, eight hundred seventy-two".