398749964 has 12 divisors (see below), whose sum is σ = 708228024. Its totient is φ = 196399104.

The previous prime is 398749961. The next prime is 398749991. The reversal of 398749964 is 469947893.

It is not an unprimeable number, because it can be changed into a prime (398749961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 743669 + ... + 744204.

It is an arithmetic number, because the mean of its divisors is an integer number (59019002).

Almost surely, 2^398749964 is an apocalyptic number.

It is an amenable number.

398749964 is a deficient number, since it is larger than the sum of its proper divisors (309478060).

398749964 is a wasteful number, since it uses less digits than its factorization.

398749964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1487944 (or 1487942 counting only the distinct ones).

The product of its digits is 11757312, while the sum is 59.

The square root of 398749964 is about 19968.7246463063. The cubic root of 398749964 is about 736.0379701386.

The spelling of 398749964 in words is "three hundred ninety-eight million, seven hundred forty-nine thousand, nine hundred sixty-four".