831424940 has 12 divisors (see below), whose sum is σ = 1745992416. Its totient is φ = 332569968.

The previous prime is 831424903. The next prime is 831424943. The reversal of 831424940 is 49424138.

It is a self number, because there is not a number n which added to its sum of digits gives 831424940.

It is not an unprimeable number, because it can be changed into a prime (831424943) 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, 20785604 + ... + 20785643.

It is an arithmetic number, because the mean of its divisors is an integer number (145499368).

Almost surely, 2^831424940 is an apocalyptic number.

It is an amenable number.

831424940 is an abundant number, since it is smaller than the sum of its proper divisors (914567476).

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

831424940 is a wasteful number, since it uses less digits than its factorization.

831424940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41571256 (or 41571254 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 831424940 is about 28834.4401714339. The cubic root of 831424940 is about 940.3171330735.

The spelling of 831424940 in words is "eight hundred thirty-one million, four hundred twenty-four thousand, nine hundred forty".