13979128 has 16 divisors (see below), whose sum is σ = 26821080. Its totient is φ = 6826848.

The previous prime is 13979113. The next prime is 13979143. The reversal of 13979128 is 82197931.

It is an interprime number because it is at equal distance from previous prime (13979113) and next prime (13979143).

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, 19975 + ... + 20662.

Almost surely, 2^13979128 is an apocalyptic number.

It is an amenable number.

13979128 is a deficient number, since it is larger than the sum of its proper divisors (12841952).

13979128 is a wasteful number, since it uses less digits than its factorization.

13979128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40686 (or 40682 counting only the distinct ones).

The product of its digits is 27216, while the sum is 40.

The square root of 13979128 is about 3738.8672081260. The cubic root of 13979128 is about 240.8943942532.

The spelling of 13979128 in words is "thirteen million, nine hundred seventy-nine thousand, one hundred twenty-eight".