398732328 has 64 divisors (see below), whose sum is σ = 1165896000. Its totient is φ = 125914176.

The previous prime is 398732311. The next prime is 398732357. The reversal of 398732328 is 823237893.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44475 + ... + 52682.

It is an arithmetic number, because the mean of its divisors is an integer number (18217125).

Almost surely, 2^398732328 is an apocalyptic number.

398732328 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

398732328 is an abundant number, since it is smaller than the sum of its proper divisors (767163672).

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

398732328 is a wasteful number, since it uses less digits than its factorization.

398732328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97191 (or 97181 counting only the distinct ones).

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

The square root of 398732328 is about 19968.2830508785. The cubic root of 398732328 is about 736.0271187629.

It can be divided in two parts, 3987 and 32328, that added together give a triangular number (36315 = T₂₆₉).

The spelling of 398732328 in words is "three hundred ninety-eight million, seven hundred thirty-two thousand, three hundred twenty-eight".