398596644 has 36 divisors (see below), whose sum is σ = 1021372716. Its totient is φ = 131044608.

The previous prime is 398596621. The next prime is 398596651. The reversal of 398596644 is 446695893.

398596644 is a `hidden beast` number, since 3 + 9 + 8 + 596 + 6 + 44 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 252428544 + 146168100 = 15888^2 + 12090^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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, 73209 + ... + 78464.

Almost surely, 2^398596644 is an apocalyptic number.

It is an amenable number.

398596644 is an abundant number, since it is smaller than the sum of its proper divisors (622776072).

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

398596644 is a wasteful number, since it uses less digits than its factorization.

398596644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151756 (or 151751 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 54.

The square root of 398596644 is about 19964.8852739003. The cubic root of 398596644 is about 735.9436221190.

The spelling of 398596644 in words is "three hundred ninety-eight million, five hundred ninety-six thousand, six hundred forty-four".