398642328 has 48 divisors (see below), whose sum is σ = 1233894480. Its totient is φ = 113897664.

The previous prime is 398642281. The next prime is 398642339. The reversal of 398642328 is 823246893.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

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, 394975 + ... + 395982.

It is an arithmetic number, because the mean of its divisors is an integer number (25706135).

Almost surely, 2^398642328 is an apocalyptic number.

It is an amenable number.

398642328 is an abundant number, since it is smaller than the sum of its proper divisors (835252152).

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

398642328 is a wasteful number, since it uses less digits than its factorization.

398642328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790976 (or 790969 counting only the distinct ones).

The product of its digits is 497664, while the sum is 45.

The square root of 398642328 is about 19966.0293498732. The cubic root of 398642328 is about 735.9717370606.

The spelling of 398642328 in words is "three hundred ninety-eight million, six hundred forty-two thousand, three hundred twenty-eight".