823956 has 48 divisors (see below), whose sum is σ = 2330496. Its totient is φ = 221184.

The previous prime is 823913. The next prime is 823961. The reversal of 823956 is 659328.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

823956 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1140 + ... + 1716.

It is an arithmetic number, because the mean of its divisors is an integer number (48552).

2⁸²³⁹⁵⁶ 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 823956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1165248).

823956 is an abundant number, since it is smaller than the sum of its proper divisors (1506540).

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

823956 is a wasteful number, since it uses less digits than its factorization.

823956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608 (or 606 counting only the distinct ones).

The product of its digits is 12960, while the sum is 33.

The square root of 823956 is about 907.7202212136. The cubic root of 823956 is about 93.7492942169.

The spelling of 823956 in words is "eight hundred twenty-three thousand, nine hundred fifty-six".