831283728 has 40 divisors (see below), whose sum is σ = 2342710176. Its totient is φ = 251904000.

The previous prime is 831283727. The next prime is 831283729. The reversal of 831283728 is 827382138.

It is an interprime number because it is at equal distance from previous prime (831283727) and next prime (831283729).

It is a super-3 number, since 3×831283728³ (a number of 28 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 831283728.

It is not an unprimeable number, because it can be changed into a prime (831283721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 786673 + ... + 787728.

Almost surely, 2^831283728 is an apocalyptic number.

831283728 is a gapful number since it is divisible by the number (88) formed by its first and last digit.

It is an amenable number.

831283728 is an abundant number, since it is smaller than the sum of its proper divisors (1511426448).

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

831283728 is a wasteful number, since it uses less digits than its factorization.

831283728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1574423 (or 1574417 counting only the distinct ones).

The product of its digits is 129024, while the sum is 42.

The square root of 831283728 is about 28831.9913984449. The cubic root of 831283728 is about 940.2638945209.

The spelling of 831283728 in words is "eight hundred thirty-one million, two hundred eighty-three thousand, seven hundred twenty-eight".