831280 has 20 divisors (see below), whose sum is σ = 1932912. Its totient is φ = 332480.

The previous prime is 831253. The next prime is 831287. The reversal of 831280 is 82138.

831280 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (831287) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5116 + ... + 5275.

2⁸³¹²⁸⁰ is an apocalyptic number.

831280 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

831280 is an abundant number, since it is smaller than the sum of its proper divisors (1101632).

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

831280 is a wasteful number, since it uses less digits than its factorization.

831280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10404 (or 10398 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 831280 is about 911.7455785470. The cubic root of 831280 is about 94.0262488940.

It can be divided in two parts, 831 and 280, that added together give a palindrome (1111).

The spelling of 831280 in words is "eight hundred thirty-one thousand, two hundred eighty".