398831374960 has 80 divisors (see below), whose sum is σ = 941021690400. Its totient is φ = 157185266688.

The previous prime is 398831374937. The next prime is 398831374961. The reversal of 398831374960 is 69473138893.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398831374961) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1433122 + ... + 1688638.

It is an arithmetic number, because the mean of its divisors is an integer number (11762771130).

Almost surely, 2^398831374960 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 398831374960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (470510845200).

398831374960 is an abundant number, since it is smaller than the sum of its proper divisors (542190315440).

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

398831374960 is a wasteful number, since it uses less digits than its factorization.

398831374960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255818 (or 255812 counting only the distinct ones).

The product of its (nonzero) digits is 23514624, while the sum is 61.

The spelling of 398831374960 in words is "three hundred ninety-eight billion, eight hundred thirty-one million, three hundred seventy-four thousand, nine hundred sixty".