398874920 has 32 divisors (see below), whose sum is σ = 909769320. Its totient is φ = 157363200.

The previous prime is 398874899. The next prime is 398874953. The reversal of 398874920 is 29478893.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 295771204 + 103103716 = 17198^2 + 10154^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65381 + ... + 71220.

Almost surely, 2^398874920 is an apocalyptic number.

It is an amenable number.

398874920 is an abundant number, since it is smaller than the sum of its proper divisors (510894400).

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

398874920 is a wasteful number, since it uses less digits than its factorization.

398874920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136685 (or 136681 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 50.

The square root of 398874920 is about 19971.8531939327. The cubic root of 398874920 is about 736.1148460119.

The spelling of 398874920 in words is "three hundred ninety-eight million, eight hundred seventy-four thousand, nine hundred twenty".