822138 has 16 divisors (see below), whose sum is σ = 1653696. Its totient is φ = 272480.

The previous prime is 822131. The next prime is 822139. The reversal of 822138 is 831228.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 822138.

It is not an unprimeable number, because it can be changed into a prime (822131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1318 + ... + 1838.

It is an arithmetic number, because the mean of its divisors is an integer number (103356).

2⁸²²¹³⁸ is an apocalyptic number.

822138 is an abundant number, since it is smaller than the sum of its proper divisors (831558).

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

822138 is a wasteful number, since it uses less digits than its factorization.

822138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 789.

The product of its digits is 768, while the sum is 24.

The square root of 822138 is about 906.7182583361. The cubic root of 822138 is about 93.6802930718.

The spelling of 822138 in words is "eight hundred twenty-two thousand, one hundred thirty-eight".