398323728 has 60 divisors (see below), whose sum is σ = 1216099248. Its totient is φ = 120703680.

The previous prime is 398323687. The next prime is 398323741. The reversal of 398323728 is 827323893.

It is a happy number.

398323728 is a `hidden beast` number, since 398 + 3 + 237 + 28 = 666.

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, 124150 + ... + 127317.

Almost surely, 2^398323728 is an apocalyptic number.

It is an amenable number.

398323728 is an abundant number, since it is smaller than the sum of its proper divisors (817775520).

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

398323728 is a wasteful number, since it uses less digits than its factorization.

398323728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251492 (or 251483 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 398323728 is about 19958.0492032663. The cubic root of 398323728 is about 735.7756188251.

The spelling of 398323728 in words is "three hundred ninety-eight million, three hundred twenty-three thousand, seven hundred twenty-eight".