831791912 has 96 divisors (see below), whose sum is σ = 1927437120. Its totient is φ = 328512000.

The previous prime is 831791897. The next prime is 831791923. The reversal of 831791912 is 219197138.

It is a happy number.

Its product of digits (27216) is a multiple of the sum of its prime divisors (336).

It is a self number, because there is not a number n which added to its sum of digits gives 831791912.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3313787 + ... + 3314037.

It is an arithmetic number, because the mean of its divisors is an integer number (20077470).

Almost surely, 2^831791912 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 831791912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (963718560).

831791912 is an abundant number, since it is smaller than the sum of its proper divisors (1095645208).

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

831791912 is a wasteful number, since it uses less digits than its factorization.

831791912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399 (or 336 counting only the distinct ones).

The product of its digits is 27216, while the sum is 41.

The square root of 831791912 is about 28840.8029014450. The cubic root of 831791912 is about 940.4554575676.

The spelling of 831791912 in words is "eight hundred thirty-one million, seven hundred ninety-one thousand, nine hundred twelve".