13638156 has 24 divisors (see below), whose sum is σ = 36368640. Its totient is φ = 3896592.

The previous prime is 13638139. The next prime is 13638161. The reversal of 13638156 is 65183631.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81096 + ... + 81263.

It is an arithmetic number, because the mean of its divisors is an integer number (1515360).

Almost surely, 2^13638156 is an apocalyptic number.

It is an amenable number.

13638156 is an abundant number, since it is smaller than the sum of its proper divisors (22730484).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13638156 is a wasteful number, since it uses less digits than its factorization.

13638156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162373 (or 162371 counting only the distinct ones).

The product of its digits is 12960, while the sum is 33.

The square root of 13638156 is about 3692.9874085894. The cubic root of 13638156 is about 238.9196581083.

The spelling of 13638156 in words is "thirteen million, six hundred thirty-eight thousand, one hundred fifty-six".