823228 has 12 divisors (see below), whose sum is σ = 1646512. Its totient is φ = 352800.

The previous prime is 823219. The next prime is 823231. The reversal of 823228 is 822328.

823228 is an admirable number.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14673 + ... + 14728.

2⁸²³²²⁸ is an apocalyptic number.

It is an amenable number.

823228 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

823228 is a wasteful number, since it uses less digits than its factorization.

823228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29412 (or 29410 counting only the distinct ones).

The product of its digits is 1536, while the sum is 25.

The square root of 823228 is about 907.3191279809. The cubic root of 823228 is about 93.7216755914.

Subtracting from 823228 its reverse (822328), we obtain a square (900 = 30²).

The spelling of 823228 in words is "eight hundred twenty-three thousand, two hundred twenty-eight".