398081563520 has 256 divisors, whose sum is σ = 1019322817920. Its totient is φ = 148140195840.

The previous prime is 398081563499. The next prime is 398081563559. The reversal of 398081563520 is 25365180893.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 411666077 + ... + 411667043.

Almost surely, 2^398081563520 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 398081563520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (509661408960).

398081563520 is an abundant number, since it is smaller than the sum of its proper divisors (621241254400).

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

398081563520 is a wasteful number, since it uses less digits than its factorization.

398081563520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1401 (or 1389 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 50.

The spelling of 398081563520 in words is "three hundred ninety-eight billion, eighty-one million, five hundred sixty-three thousand, five hundred twenty".