831381928 has 32 divisors (see below), whose sum is σ = 1719705960. Its totient is φ = 374353920.

The previous prime is 831381877. The next prime is 831381949. The reversal of 831381928 is 829183138.

It can be written as a sum of positive squares in 4 ways, for example, as 489205924 + 342176004 = 22118^2 + 18498^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93225 + ... + 101752.

Almost surely, 2^831381928 is an apocalyptic number.

It is an amenable number.

831381928 is an abundant number, since it is smaller than the sum of its proper divisors (888324032).

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

831381928 is a wasteful number, since it uses less digits than its factorization.

831381928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195037 (or 195033 counting only the distinct ones).

The product of its digits is 82944, while the sum is 43.

The square root of 831381928 is about 28833.6943175862. The cubic root of 831381928 is about 940.3009176919.

The spelling of 831381928 in words is "eight hundred thirty-one million, three hundred eighty-one thousand, nine hundred twenty-eight".