823256 has 32 divisors (see below), whose sum is σ = 1800480. Its totient is φ = 345600.

The previous prime is 823243. The next prime is 823261. The reversal of 823256 is 652328.

It is an Ulam number.

It is a nialpdrome in base 7.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3296 + ... + 3536.

It is an arithmetic number, because the mean of its divisors is an integer number (56265).

2⁸²³²⁵⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 823256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (900240).

823256 is an abundant number, since it is smaller than the sum of its proper divisors (977224).

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

823256 is a wasteful number, since it uses less digits than its factorization.

823256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315 (or 311 counting only the distinct ones).

The product of its digits is 2880, while the sum is 26.

The square root of 823256 is about 907.3345579223. The cubic root of 823256 is about 93.7227381473.

The spelling of 823256 in words is "eight hundred twenty-three thousand, two hundred fifty-six".