13639568 has 20 divisors (see below), whose sum is σ = 27818160. Its totient is φ = 6460704.

The previous prime is 13639553. The next prime is 13639631. The reversal of 13639568 is 86593631.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

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, 22130 + ... + 22737.

It is an arithmetic number, because the mean of its divisors is an integer number (1390908).

Almost surely, 2^13639568 is an apocalyptic number.

It is an amenable number.

13639568 is an abundant number, since it is smaller than the sum of its proper divisors (14178592).

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

13639568 is a wasteful number, since it uses less digits than its factorization.

13639568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44894 (or 44888 counting only the distinct ones).

The product of its digits is 116640, while the sum is 41.

The square root of 13639568 is about 3693.1785767818. The cubic root of 13639568 is about 238.9279031847.

The spelling of 13639568 in words is "thirteen million, six hundred thirty-nine thousand, five hundred sixty-eight".