831961428 has 96 divisors (see below), whose sum is σ = 2095075584. Its totient is φ = 256278528.

The previous prime is 831961421. The next prime is 831961447. The reversal of 831961428 is 824169138.

831961428 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 831961428.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (831961421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2624326 + ... + 2624642.

It is an arithmetic number, because the mean of its divisors is an integer number (21823704).

Almost surely, 2^831961428 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 831961428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1047537792).

831961428 is an abundant number, since it is smaller than the sum of its proper divisors (1263114156).

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

831961428 is a wasteful number, since it uses less digits than its factorization.

831961428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641 (or 639 counting only the distinct ones).

The product of its digits is 82944, while the sum is 42.

The square root of 831961428 is about 28843.7415742133. The cubic root of 831961428 is about 940.5193402993.

The spelling of 831961428 in words is "eight hundred thirty-one million, nine hundred sixty-one thousand, four hundred twenty-eight".