822490 has 16 divisors (see below), whose sum is σ = 1491048. Its totient is φ = 326656.

The previous prime is 822433. The next prime is 822517. The reversal of 822490 is 94228.

822490 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 505521 + 316969 = 711^2 + 563^2 .

It is an unprimeable number.

822490 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, 2154 + ... + 2506.

2⁸²²⁴⁹⁰ is an apocalyptic number.

822490 is a deficient number, since it is larger than the sum of its proper divisors (668558).

822490 is a wasteful number, since it uses less digits than its factorization.

822490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 822490 is about 906.9123441656. The cubic root of 822490 is about 93.6936609647.

The spelling of 822490 in words is "eight hundred twenty-two thousand, four hundred ninety".