398639104 has 60 divisors (see below), whose sum is σ = 825728400. Its totient is φ = 192217088.

The previous prime is 398639083. The next prime is 398639117. The reversal of 398639104 is 401936893.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 474717 + ... + 475555.

It is an arithmetic number, because the mean of its divisors is an integer number (13762140).

Almost surely, 2^398639104 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 398639104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (412864200).

398639104 is an abundant number, since it is smaller than the sum of its proper divisors (427089296).

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

398639104 is an frugal number, since it uses more digits than its factorization.

398639104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 896 (or 870 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 43.

The square root of 398639104 is about 19965.9486125754. The cubic root of 398639104 is about 735.9697530103.

The spelling of 398639104 in words is "three hundred ninety-eight million, six hundred thirty-nine thousand, one hundred four".