22422222 has 48 divisors (see below), whose sum is σ = 50470992. Its totient is φ = 7188480.

The previous prime is 22422199. The next prime is 22422227. The reversal of 22422222 is 22222422.

It is a happy number.

22422222 is a `hidden beast` number, since 22 + 422 + 222 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

22422222 is a modest number, since divided by 22222 gives 224 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 22422195 and 22422204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22422227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 87118 + ... + 87374.

It is an arithmetic number, because the mean of its divisors is an integer number (1051479).

Almost surely, 2^22422222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22422222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25235496).

22422222 is an abundant number, since it is smaller than the sum of its proper divisors (28048770).

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

22422222 is a wasteful number, since it uses less digits than its factorization.

22422222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433 (or 430 counting only the distinct ones).

The product of its digits is 512, while the sum is 18.

The square root of 22422222 is about 4735.2108717564. The cubic root of 22422222 is about 281.9851357791.

Adding to 22422222 its reverse (22222422), we get a palindrome (44644644).

The spelling of 22422222 in words is "twenty-two million, four hundred twenty-two thousand, two hundred twenty-two".