13939864 has 16 divisors (see below), whose sum is σ = 27675000. Its totient is φ = 6559872.

The previous prime is 13939859. The next prime is 13939943. The reversal of 13939864 is 46893931.

It is a self number, because there is not a number n which added to its sum of digits gives 13939864.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51114 + ... + 51385.

Almost surely, 2^13939864 is an apocalyptic number.

It is an amenable number.

13939864 is a deficient number, since it is larger than the sum of its proper divisors (13735136).

13939864 is a wasteful number, since it uses less digits than its factorization.

13939864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102522 (or 102518 counting only the distinct ones).

The product of its digits is 139968, while the sum is 43.

The square root of 13939864 is about 3733.6127276406. The cubic root of 13939864 is about 240.6686446722.

The spelling of 13939864 in words is "thirteen million, nine hundred thirty-nine thousand, eight hundred sixty-four".