444664624 has 20 divisors (see below), whose sum is σ = 875663200. Its totient is φ = 218687040.

The previous prime is 444664621. The next prime is 444664637. The reversal of 444664624 is 426466444.

It is a happy number.

It is a super-2 number, since 2×444664624² = 395453255674122752, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (444664621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 226824 + ... + 228775.

It is an arithmetic number, because the mean of its divisors is an integer number (43783160).

Almost surely, 2^444664624 is an apocalyptic number.

It is an amenable number.

444664624 is a deficient number, since it is larger than the sum of its proper divisors (430998576).

444664624 is a wasteful number, since it uses less digits than its factorization.

444664624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455668 (or 455662 counting only the distinct ones).

The product of its digits is 442368, while the sum is 40.

The square root of 444664624 is about 21087.0724378706. The cubic root of 444664624 is about 763.2688289007.

The spelling of 444664624 in words is "four hundred forty-four million, six hundred sixty-four thousand, six hundred twenty-four".