831228 has 24 divisors (see below), whose sum is σ = 1959888. Its totient is φ = 274176.

The previous prime is 831221. The next prime is 831239. The reversal of 831228 is 822138.

It is a junction number, because it is equal to n+sod(n) for n = 831198 and 831207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (831221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1050 + ... + 1662.

It is an arithmetic number, because the mean of its divisors is an integer number (81662).

2⁸³¹²²⁸ is an apocalyptic number.

It is an amenable number.

831228 is an abundant number, since it is smaller than the sum of its proper divisors (1128660).

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

831228 is a wasteful number, since it uses less digits than its factorization.

831228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733 (or 731 counting only the distinct ones).

The product of its digits is 768, while the sum is 24.

The square root of 831228 is about 911.7170613738. The cubic root of 831228 is about 94.0242882763.

The spelling of 831228 in words is "eight hundred thirty-one thousand, two hundred twenty-eight".