398312695520 has 192 divisors, whose sum is σ = 1066009896000. Its totient is φ = 139730780160.

The previous prime is 398312695489. The next prime is 398312695523. The reversal of 398312695520 is 25596213893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398312695523) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3089306 + ... + 3215654.

It is an arithmetic number, because the mean of its divisors is an integer number (5552134875).

Almost surely, 2^398312695520 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 398312695520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (533004948000).

398312695520 is an abundant number, since it is smaller than the sum of its proper divisors (667697200480).

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

398312695520 is a wasteful number, since it uses less digits than its factorization.

398312695520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126461 (or 126453 counting only the distinct ones).

The product of its (nonzero) digits is 3499200, while the sum is 53.

The spelling of 398312695520 in words is "three hundred ninety-eight billion, three hundred twelve million, six hundred ninety-five thousand, five hundred twenty".