831728660 has 48 divisors (see below), whose sum is σ = 2004186240. Its totient is φ = 284016000.

The previous prime is 831728647. The next prime is 831728663. The reversal of 831728660 is 66827138.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (831728663) 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, 23306 + ... + 46974.

It is an arithmetic number, because the mean of its divisors is an integer number (41753880).

Almost surely, 2^831728660 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 831728660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1002093120).

831728660 is an abundant number, since it is smaller than the sum of its proper divisors (1172457580).

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

831728660 is a wasteful number, since it uses less digits than its factorization.

831728660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23936 (or 23934 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 831728660 is about 28839.7063091842. The cubic root of 831728660 is about 940.4316185939.

The spelling of 831728660 in words is "eight hundred thirty-one million, seven hundred twenty-eight thousand, six hundred sixty".