444688168 has 8 divisors (see below), whose sum is σ = 833790330. Its totient is φ = 222344080.

The previous prime is 444688157. The next prime is 444688171. The reversal of 444688168 is 861886444.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 239568484 + 205119684 = 15478^2 + 14322^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27793003 + ... + 27793018.

Almost surely, 2^444688168 is an apocalyptic number.

It is an amenable number.

444688168 is a deficient number, since it is larger than the sum of its proper divisors (389102162).

444688168 is a wasteful number, since it uses less digits than its factorization.

444688168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55586027 (or 55586023 counting only the distinct ones).

The product of its digits is 1179648, while the sum is 49.

The square root of 444688168 is about 21087.6306872062. The cubic root of 444688168 is about 763.2822997903.

The spelling of 444688168 in words is "four hundred forty-four million, six hundred eighty-eight thousand, one hundred sixty-eight".