13564144 has 20 divisors (see below), whose sum is σ = 28670040. Its totient is φ = 6165440.

The previous prime is 13564139. The next prime is 13564169. The reversal of 13564144 is 44146531.

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, 38359 + ... + 38710.

It is an arithmetic number, because the mean of its divisors is an integer number (1433502).

Almost surely, 2^13564144 is an apocalyptic number.

It is an amenable number.

13564144 is an abundant number, since it is smaller than the sum of its proper divisors (15105896).

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

13564144 is a wasteful number, since it uses less digits than its factorization.

13564144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77088 (or 77082 counting only the distinct ones).

The product of its digits is 5760, while the sum is 28.

The square root of 13564144 is about 3682.9531628844. The cubic root of 13564144 is about 238.4866815400.

The spelling of 13564144 in words is "thirteen million, five hundred sixty-four thousand, one hundred forty-four".