823560 has 32 divisors (see below), whose sum is σ = 2471040. Its totient is φ = 219584.

The previous prime is 823553. The next prime is 823573. The reversal of 823560 is 65328.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 823560.

It is an unprimeable number.

823560 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 7 ways as a sum of consecutive naturals, for example, 3312 + ... + 3551.

It is an arithmetic number, because the mean of its divisors is an integer number (77220).

2⁸²³⁵⁶⁰ is an apocalyptic number.

It is an amenable number.

823560 is an abundant number, since it is smaller than the sum of its proper divisors (1647480).

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

823560 is a wasteful number, since it uses less digits than its factorization.

823560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6877 (or 6873 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 823560 is about 907.5020661134. The cubic root of 823560 is about 93.7342729174.

Adding to 823560 its reverse (65328), we get a palindrome (888888).

The spelling of 823560 in words is "eight hundred twenty-three thousand, five hundred sixty".