822090 has 32 divisors (see below), whose sum is σ = 2007360. Its totient is φ = 215424.

The previous prime is 822079. The next prime is 822113. The reversal of 822090 is 90228.

It is an unprimeable number.

822090 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, 1806 + ... + 2214.

It is an arithmetic number, because the mean of its divisors is an integer number (62730).

2⁸²²⁰⁹⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 822090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1003680).

822090 is an abundant number, since it is smaller than the sum of its proper divisors (1185270).

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

822090 is a wasteful number, since it uses less digits than its factorization.

822090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 822090 is about 906.6917888676. The cubic root of 822090 is about 93.6784698817.

The spelling of 822090 in words is "eight hundred twenty-two thousand, ninety".