13638836 has 12 divisors (see below), whose sum is σ = 24376128. Its totient is φ = 6674232.

The previous prime is 13638817. The next prime is 13638881. The reversal of 13638836 is 63883631.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 13638836.

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, 36086 + ... + 36461.

It is an arithmetic number, because the mean of its divisors is an integer number (2031344).

Almost surely, 2^13638836 is an apocalyptic number.

It is an amenable number.

13638836 is a deficient number, since it is larger than the sum of its proper divisors (10737292).

13638836 is a wasteful number, since it uses less digits than its factorization.

13638836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72598 (or 72596 counting only the distinct ones).

The product of its digits is 62208, while the sum is 38.

The square root of 13638836 is about 3693.0794738267. The cubic root of 13638836 is about 238.9236288960.

The spelling of 13638836 in words is "thirteen million, six hundred thirty-eight thousand, eight hundred thirty-six".