13978364 has 12 divisors (see below), whose sum is σ = 24982944. Its totient is φ = 6840384.

The previous prime is 13978337. The next prime is 13978421. The reversal of 13978364 is 46387931.

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, 36989 + ... + 37364.

It is an arithmetic number, because the mean of its divisors is an integer number (2081912).

Almost surely, 2^13978364 is an apocalyptic number.

It is an amenable number.

13978364 is a deficient number, since it is larger than the sum of its proper divisors (11004580).

13978364 is a wasteful number, since it uses less digits than its factorization.

13978364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74404 (or 74402 counting only the distinct ones).

The product of its digits is 108864, while the sum is 41.

The square root of 13978364 is about 3738.7650367468. The cubic root of 13978364 is about 240.8900056469.

The spelling of 13978364 in words is "thirteen million, nine hundred seventy-eight thousand, three hundred sixty-four".