398980311928 has 32 divisors (see below), whose sum is σ = 816188400000. Its totient is φ = 181334174560.

The previous prime is 398980311859. The next prime is 398980311931. The reversal of 398980311928 is 829113089893.

It is a congruent number.

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, 540003 + ... + 1043821.

It is an arithmetic number, because the mean of its divisors is an integer number (25505887500).

Almost surely, 2^398980311928 is an apocalyptic number.

It is an amenable number.

398980311928 is an abundant number, since it is smaller than the sum of its proper divisors (417208088072).

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

398980311928 is a wasteful number, since it uses less digits than its factorization.

398980311928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512835 (or 512831 counting only the distinct ones).

The product of its (nonzero) digits is 6718464, while the sum is 61.

The spelling of 398980311928 in words is "three hundred ninety-eight billion, nine hundred eighty million, three hundred eleven thousand, nine hundred twenty-eight".