13664044 has 6 divisors (see below), whose sum is σ = 23912084. Its totient is φ = 6832020.

The previous prime is 13663999. The next prime is 13664069. The reversal of 13664044 is 44046631.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1708002 + ... + 1708009.

Almost surely, 2^13664044 is an apocalyptic number.

It is an amenable number.

13664044 is a deficient number, since it is larger than the sum of its proper divisors (10248040).

13664044 is a wasteful number, since it uses less digits than its factorization.

13664044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3416015 (or 3416013 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 13664044 is about 3696.4907682828. The cubic root of 13664044 is about 239.0707352938.

The spelling of 13664044 in words is "thirteen million, six hundred sixty-four thousand, forty-four".