444399980 has 12 divisors (see below), whose sum is σ = 933240000. Its totient is φ = 177759984.

The previous prime is 444399979. The next prime is 444400003. The reversal of 444399980 is 89993444.

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

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, 11109980 + ... + 11110019.

It is an arithmetic number, because the mean of its divisors is an integer number (77770000).

Almost surely, 2^444399980 is an apocalyptic number.

It is an amenable number.

444399980 is an abundant number, since it is smaller than the sum of its proper divisors (488840020).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

444399980 is a wasteful number, since it uses less digits than its factorization.

444399980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22220008 (or 22220006 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 50.

The square root of 444399980 is about 21080.7964745168. The cubic root of 444399980 is about 763.1173779787.

The spelling of 444399980 in words is "four hundred forty-four million, three hundred ninety-nine thousand, nine hundred eighty".