13664344 has 16 divisors (see below), whose sum is σ = 26969400. Its totient is φ = 6472512.

The previous prime is 13664333. The next prime is 13664351. The reversal of 13664344 is 44346631.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44797 + ... + 45100.

Almost surely, 2^13664344 is an apocalyptic number.

It is an amenable number.

13664344 is a deficient number, since it is larger than the sum of its proper divisors (13305056).

13664344 is a wasteful number, since it uses less digits than its factorization.

13664344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89922 (or 89918 counting only the distinct ones).

The product of its digits is 20736, while the sum is 31.

The square root of 13664344 is about 3696.5313470874. The cubic root of 13664344 is about 239.0724849148.

The spelling of 13664344 in words is "thirteen million, six hundred sixty-four thousand, three hundred forty-four".