13664444 has 6 divisors (see below), whose sum is σ = 23912784. Its totient is φ = 6832220.

The previous prime is 13664429. The next prime is 13664467. The reversal of 13664444 is 44446631.

It is a self number, because there is not a number n which added to its sum of digits gives 13664444.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1708052 + ... + 1708059.

It is an arithmetic number, because the mean of its divisors is an integer number (3985464).

Almost surely, 2^13664444 is an apocalyptic number.

It is an amenable number.

13664444 is a deficient number, since it is larger than the sum of its proper divisors (10248340).

13664444 is a wasteful number, since it uses less digits than its factorization.

13664444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3416115 (or 3416113 counting only the distinct ones).

The product of its digits is 27648, while the sum is 32.

The square root of 13664444 is about 3696.5448732566. The cubic root of 13664444 is about 239.0730681161.

The spelling of 13664444 in words is "thirteen million, six hundred sixty-four thousand, four hundred forty-four".