398668620 has 48 divisors (see below), whose sum is σ = 1275740928. Its totient is φ = 91124160.

The previous prime is 398668603. The next prime is 398668657. The reversal of 398668620 is 26866893.

It is a self number, because there is not a number n which added to its sum of digits gives 398668620.

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, 474186 + ... + 475025.

It is an arithmetic number, because the mean of its divisors is an integer number (26577936).

Almost surely, 2^398668620 is an apocalyptic number.

398668620 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

398668620 is an abundant number, since it is smaller than the sum of its proper divisors (877072308).

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

398668620 is a wasteful number, since it uses less digits than its factorization.

398668620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 949230 (or 949228 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 48.

The square root of 398668620 is about 19966.6877573623. The cubic root of 398668620 is about 735.9879167637.

The spelling of 398668620 in words is "three hundred ninety-eight million, six hundred sixty-eight thousand, six hundred twenty".