13979872 has 12 divisors (see below), whose sum is σ = 27522936. Its totient is φ = 6989920.

The previous prime is 13979857. The next prime is 13979921. The reversal of 13979872 is 27897931.

It is a happy number.

It is a super-2 number, since 2×13979872² = 390873642272768, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 218404 + ... + 218467.

It is an arithmetic number, because the mean of its divisors is an integer number (2293578).

Almost surely, 2^13979872 is an apocalyptic number.

It is an amenable number.

13979872 is a deficient number, since it is larger than the sum of its proper divisors (13543064).

13979872 is an equidigital number, since it uses as much as digits as its factorization.

13979872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436881 (or 436873 counting only the distinct ones).

The product of its digits is 190512, while the sum is 46.

The square root of 13979872 is about 3738.9667021786. The cubic root of 13979872 is about 240.8986678209.

The spelling of 13979872 in words is "thirteen million, nine hundred seventy-nine thousand, eight hundred seventy-two".