398979824 has 20 divisors (see below), whose sum is σ = 774135720. Its totient is φ = 199202880.

The previous prime is 398979797. The next prime is 398979853. The reversal of 398979824 is 428979893.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6242 + ... + 28929.

It is an arithmetic number, because the mean of its divisors is an integer number (38706786).

Almost surely, 2^398979824 is an apocalyptic number.

It is an amenable number.

398979824 is a deficient number, since it is larger than the sum of its proper divisors (375155896).

398979824 is a wasteful number, since it uses less digits than its factorization.

398979824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35888 (or 35882 counting only the distinct ones).

The product of its digits is 7838208, while the sum is 59.

The square root of 398979824 is about 19974.4793173690. The cubic root of 398979824 is about 736.1793730263.

The spelling of 398979824 in words is "three hundred ninety-eight million, nine hundred seventy-nine thousand, eight hundred twenty-four".