831320 has 32 divisors (see below), whose sum is σ = 2138400. Its totient is φ = 284928.

The previous prime is 831301. The next prime is 831323. The reversal of 831320 is 23138.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (831323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1205 + ... + 1764.

It is an arithmetic number, because the mean of its divisors is an integer number (66825).

2⁸³¹³²⁰ is an apocalyptic number.

It is an amenable number.

831320 is an abundant number, since it is smaller than the sum of its proper divisors (1307080).

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

831320 is a wasteful number, since it uses less digits than its factorization.

831320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2987 (or 2983 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 831320 is about 911.7675142272. The cubic root of 831320 is about 94.0277570059.

Adding to 831320 its reverse (23138), we get a palindrome (854458).

The spelling of 831320 in words is "eight hundred thirty-one thousand, three hundred twenty".