831240684 has 96 divisors (see below), whose sum is σ = 2228567040. Its totient is φ = 267781824.

The previous prime is 831240667. The next prime is 831240689. The reversal of 831240684 is 486042138.

It is a super-2 number, since 2×831240684² = 1381922149473575712, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (831240689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 420322 + ... + 422294.

It is an arithmetic number, because the mean of its divisors is an integer number (23214240).

Almost surely, 2^831240684 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 831240684, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1114283520).

831240684 is an abundant number, since it is smaller than the sum of its proper divisors (1397326356).

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

831240684 is a wasteful number, since it uses less digits than its factorization.

831240684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2116 (or 2108 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The square root of 831240684 is about 28831.2449262948. The cubic root of 831240684 is about 940.2476652375.

The spelling of 831240684 in words is "eight hundred thirty-one million, two hundred forty thousand, six hundred eighty-four".