398703808 has 56 divisors (see below), whose sum is σ = 815746400. Its totient is φ = 193259520.

The previous prime is 398703791. The next prime is 398703821. The reversal of 398703808 is 808307893.

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, 284293 + ... + 285691.

It is an arithmetic number, because the mean of its divisors is an integer number (14566900).

Almost surely, 2^398703808 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 398703808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (407873200).

398703808 is an abundant number, since it is smaller than the sum of its proper divisors (417042592).

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

398703808 is a wasteful number, since it uses less digits than its factorization.

398703808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1545 (or 1535 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 46.

The square root of 398703808 is about 19967.5689056029. The cubic root of 398703808 is about 736.0095698189.

The spelling of 398703808 in words is "three hundred ninety-eight million, seven hundred three thousand, eight hundred eight".