823172 has 12 divisors (see below), whose sum is σ = 1646400. Its totient is φ = 352776.

The previous prime is 823169. The next prime is 823177. The reversal of 823172 is 271328.

823172 is an admirable number.

It is a super-2 number, since 2×823172² = 1355224283168, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (823177) 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, 14672 + ... + 14727.

It is an arithmetic number, because the mean of its divisors is an integer number (137200).

2⁸²³¹⁷² is an apocalyptic number.

It is an amenable number.

823172 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.

823172 is a wasteful number, since it uses less digits than its factorization.

823172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29410 (or 29408 counting only the distinct ones).

The product of its digits is 672, while the sum is 23.

The square root of 823172 is about 907.2882673109. The cubic root of 823172 is about 93.7195504075.

The spelling of 823172 in words is "eight hundred twenty-three thousand, one hundred seventy-two".