822556 has 24 divisors (see below), whose sum is σ = 1703520. Its totient is φ = 340032.

The previous prime is 822553. The next prime is 822557. The reversal of 822556 is 655228.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (822551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 306 + ... + 1318.

It is an arithmetic number, because the mean of its divisors is an integer number (70980).

2⁸²²⁵⁵⁶ 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 822556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (851760).

822556 is an abundant number, since it is smaller than the sum of its proper divisors (880964).

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

822556 is a wasteful number, since it uses less digits than its factorization.

822556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1053 (or 1051 counting only the distinct ones).

The product of its digits is 4800, while the sum is 28.

The square root of 822556 is about 906.9487306348. The cubic root of 822556 is about 93.6961670200.

It can be divided in two parts, 8225 and 56, that added together give a square (8281 = 91²).

The spelling of 822556 in words is "eight hundred twenty-two thousand, five hundred fifty-six".