444893994 has 24 divisors (see below), whose sum is σ = 989990820. Its totient is φ = 144289728.

The previous prime is 444893983. The next prime is 444894007. The reversal of 444893994 is 499398444.

444893994 is a `hidden beast` number, since 44 + 489 + 39 + 94 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 430355025 + 14538969 = 20745^2 + 3813^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 444893994.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 333339 + ... + 334670.

Almost surely, 2^444893994 is an apocalyptic number.

444893994 is an abundant number, since it is smaller than the sum of its proper divisors (545096826).

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

444893994 is a wasteful number, since it uses less digits than its factorization.

444893994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668054 (or 668051 counting only the distinct ones).

The product of its digits is 4478976, while the sum is 54.

The square root of 444893994 is about 21092.5103769087. The cubic root of 444893994 is about 763.4000445543.

The spelling of 444893994 in words is "four hundred forty-four million, eight hundred ninety-three thousand, nine hundred ninety-four".