398332928 has 88 divisors (see below), whose sum is σ = 925964544. Its totient is φ = 167731200.

The previous prime is 398332897. The next prime is 398332937. The reversal of 398332928 is 829233893.

It is a congruent number.

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, 436793 + ... + 437703.

Almost surely, 2^398332928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 398332928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (462982272).

398332928 is an abundant number, since it is smaller than the sum of its proper divisors (527631616).

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

398332928 is an equidigital number, since it uses as much as digits as its factorization.

398332928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 999 (or 981 counting only the distinct ones).

The product of its digits is 559872, while the sum is 47.

The square root of 398332928 is about 19958.2796853837. The cubic root of 398332928 is about 735.7812834668.

The spelling of 398332928 in words is "three hundred ninety-eight million, three hundred thirty-two thousand, nine hundred twenty-eight".