444388664 has 16 divisors (see below), whose sum is σ = 833784000. Its totient is φ = 222046272.

The previous prime is 444388643. The next prime is 444388717. The reversal of 444388664 is 466883444.

It is a congruent number.

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, 5189 + ... + 30260.

It is an arithmetic number, because the mean of its divisors is an integer number (52111500).

Almost surely, 2^444388664 is an apocalyptic number.

It is an amenable number.

444388664 is a deficient number, since it is larger than the sum of its proper divisors (389395336).

444388664 is a wasteful number, since it uses less digits than its factorization.

444388664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37022 (or 37018 counting only the distinct ones).

The product of its digits is 1769472, while the sum is 47.

The square root of 444388664 is about 21080.5280768770. The cubic root of 444388664 is about 763.1109006985.

The spelling of 444388664 in words is "four hundred forty-four million, three hundred eighty-eight thousand, six hundred sixty-four".