398600664 has 64 divisors (see below), whose sum is σ = 1242397440. Its totient is φ = 103532160.

The previous prime is 398600633. The next prime is 398600687. The reversal of 398600664 is 466006893.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105999 + ... + 109694.

It is an arithmetic number, because the mean of its divisors is an integer number (19412460).

Almost surely, 2^398600664 is an apocalyptic number.

It is an amenable number.

398600664 is an abundant number, since it is smaller than the sum of its proper divisors (843796776).

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

398600664 is a wasteful number, since it uses less digits than its factorization.

398600664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215720 (or 215716 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 42.

The square root of 398600664 is about 19964.9859504083. The cubic root of 398600664 is about 735.9460962019.

The spelling of 398600664 in words is "three hundred ninety-eight million, six hundred thousand, six hundred sixty-four".