398663856000 has 512 divisors, whose sum is σ = 1486670889600. Its totient is φ = 106301030400.

The previous prime is 398663855963. The next prime is 398663856043. The reversal of 398663856000 is 658366893.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 34986304 + ... + 34997696.

Almost surely, 2^398663856000 is an apocalyptic number.

398663856000 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 398663856000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (743335444800).

398663856000 is an abundant number, since it is smaller than the sum of its proper divisors (1088007033600).

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

398663856000 is an frugal number, since it uses more digits than its factorization.

398663856000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11443 (or 11403 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 54.

The spelling of 398663856000 in words is "three hundred ninety-eight billion, six hundred sixty-three million, eight hundred fifty-six thousand".