831021928704 has 1080 divisors, whose sum is σ = 2889417041280. Its totient is φ = 237967994880.

The previous prime is 831021928703. The next prime is 831021928787. The reversal of 831021928704 is 407829120138.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 831021928704.

It is not an unprimeable number, because it can be changed into a prime (831021928703) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 17681317609 + ... + 17681317655.

Almost surely, 2^831021928704 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 831021928704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1444708520640).

831021928704 is an abundant number, since it is smaller than the sum of its proper divisors (2058395112576).

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

831021928704 is an frugal number, since it uses more digits than its factorization.

831021928704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141 (or 92 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The spelling of 831021928704 in words is "eight hundred thirty-one billion, twenty-one million, nine hundred twenty-eight thousand, seven hundred four".