398100920 has 64 divisors (see below), whose sum is σ = 1077580800. Its totient is φ = 129306240.

The previous prime is 398100889. The next prime is 398100929. The reversal of 398100920 is 29001893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398100929) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32096 + ... + 42735.

It is an arithmetic number, because the mean of its divisors is an integer number (16837200).

Almost surely, 2^398100920 is an apocalyptic number.

It is an amenable number.

398100920 is an abundant number, since it is smaller than the sum of its proper divisors (679479880).

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

398100920 is a wasteful number, since it uses less digits than its factorization.

398100920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74868 (or 74864 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 398100920 is about 19952.4665141932. The cubic root of 398100920 is about 735.6384044115.

The spelling of 398100920 in words is "three hundred ninety-eight million, one hundred thousand, nine hundred twenty".