831975640 has 16 divisors (see below), whose sum is σ = 1871945280. Its totient is φ = 332790240.

The previous prime is 831975637. The next prime is 831975643. The reversal of 831975640 is 46579138.

831975640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (831975637) and next prime (831975643).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (831975643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10399656 + ... + 10399735.

It is an arithmetic number, because the mean of its divisors is an integer number (116996580).

Almost surely, 2^831975640 is an apocalyptic number.

It is an amenable number.

831975640 is an abundant number, since it is smaller than the sum of its proper divisors (1039969640).

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

831975640 is a wasteful number, since it uses less digits than its factorization.

831975640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20799402 (or 20799398 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 831975640 is about 28843.9879350966. The cubic root of 831975640 is about 940.5246957498.

The spelling of 831975640 in words is "eight hundred thirty-one million, nine hundred seventy-five thousand, six hundred forty".