831285312 has 336 divisors, whose sum is σ = 2771070912. Its totient is φ = 217251840.

The previous prime is 831285307. The next prime is 831285313. The reversal of 831285312 is 213582138.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (831285313) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6067708 + ... + 6067844.

Almost surely, 2^831285312 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 831285312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1385535456).

831285312 is an abundant number, since it is smaller than the sum of its proper divisors (1939785600).

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

831285312 is a wasteful number, since it uses less digits than its factorization.

831285312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206 (or 183 counting only the distinct ones).

The product of its digits is 11520, while the sum is 33.

The square root of 831285312 is about 28832.0188679184. The cubic root of 831285312 is about 940.2644917406.

The spelling of 831285312 in words is "eight hundred thirty-one million, two hundred eighty-five thousand, three hundred twelve".