818922 has 16 divisors (see below), whose sum is σ = 1764000. Its totient is φ = 251952.

The previous prime is 818897. The next prime is 818947. The reversal of 818922 is 229818.

It is an interprime number because it is at equal distance from previous prime (818897) and next prime (818947).

It is a plaindrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 818922.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5172 + ... + 5327.

It is an arithmetic number, because the mean of its divisors is an integer number (110250).

2⁸¹⁸⁹²² is an apocalyptic number.

818922 is an abundant number, since it is smaller than the sum of its proper divisors (945078).

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

818922 is a wasteful number, since it uses less digits than its factorization.

818922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10517.

The product of its digits is 2304, while the sum is 30.

The square root of 818922 is about 904.9430921334. The cubic root of 818922 is about 93.5579820903.

Subtracting from 818922 its product of digits (2304), we obtain a palindrome (816618).

The spelling of 818922 in words is "eight hundred eighteen thousand, nine hundred twenty-two".