13664868 has 24 divisors (see below), whose sum is σ = 36439872. Its totient is φ = 3904224.

The previous prime is 13664839. The next prime is 13664879. The reversal of 13664868 is 86846631.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

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, 81255 + ... + 81422.

It is an arithmetic number, because the mean of its divisors is an integer number (1518328).

Almost surely, 2^13664868 is an apocalyptic number.

It is an amenable number.

13664868 is an abundant number, since it is smaller than the sum of its proper divisors (22775004).

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

13664868 is a wasteful number, since it uses less digits than its factorization.

13664868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162691 (or 162689 counting only the distinct ones).

The product of its digits is 165888, while the sum is 42.

The square root of 13664868 is about 3696.6022236643. The cubic root of 13664868 is about 239.0755408581.

The spelling of 13664868 in words is "thirteen million, six hundred sixty-four thousand, eight hundred sixty-eight".