918222 has 16 divisors (see below), whose sum is σ = 1879680. Its totient is φ = 298872.

The previous prime is 918209. The next prime is 918223. The reversal of 918222 is 222819.

It is a junction number, because it is equal to n+sod(n) for n = 918192 and 918201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (918223) by changing a digit.

918222 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, 1522 + ... + 2037.

It is an arithmetic number, because the mean of its divisors is an integer number (117480).

2⁹¹⁸²²² is an apocalyptic number.

918222 is an abundant number, since it is smaller than the sum of its proper divisors (961458).

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

918222 is a wasteful number, since it uses less digits than its factorization.

918222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3607.

The product of its digits is 576, while the sum is 24.

The square root of 918222 is about 958.2390098509. The cubic root of 918222 is about 97.1961877622.

The spelling of 918222 in words is "nine hundred eighteen thousand, two hundred twenty-two".