444978690 has 48 divisors (see below), whose sum is σ = 1156431168. Its totient is φ = 109531968.

The previous prime is 444978683. The next prime is 444978707. The reversal of 444978690 is 96879444.

It is a super-2 number, since 2×444978690² = 396012069108232200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38814 + ... + 48953.

It is an arithmetic number, because the mean of its divisors is an integer number (24092316).

Almost surely, 2^444978690 is an apocalyptic number.

444978690 is an abundant number, since it is smaller than the sum of its proper divisors (711452478).

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

444978690 is a wasteful number, since it uses less digits than its factorization.

444978690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87803 (or 87790 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 51.

The square root of 444978690 is about 21094.5180082409. The cubic root of 444978690 is about 763.4484851780.

The spelling of 444978690 in words is "four hundred forty-four million, nine hundred seventy-eight thousand, six hundred ninety".