831140 has 24 divisors (see below), whose sum is σ = 1806840. Its totient is φ = 320768.

The previous prime is 831139. The next prime is 831161. The reversal of 831140 is 41138.

It is a happy number.

831140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 200704 + 630436 = 448^2 + 794^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137 + ... + 1296.

It is an arithmetic number, because the mean of its divisors is an integer number (75285).

2⁸³¹¹⁴⁰ is an apocalyptic number.

It is an amenable number.

831140 is an abundant number, since it is smaller than the sum of its proper divisors (975700).

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

831140 is a wasteful number, since it uses less digits than its factorization.

831140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1471 (or 1469 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 831140 is about 911.6687995100. The cubic root of 831140 is about 94.0209701216.

Adding to 831140 its reverse (41138), we get a palindrome (872278).

The spelling of 831140 in words is "eight hundred thirty-one thousand, one hundred forty".