22404222 has 16 divisors (see below), whose sum is σ = 49787280. Its totient is φ = 7468056.

The previous prime is 22404209. The next prime is 22404229. The reversal of 22404222 is 22240422.

22404222 is a `hidden beast` number, since 2 + 240 + 422 + 2 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 22404195 and 22404204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22404229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 207393 + ... + 207500.

It is an arithmetic number, because the mean of its divisors is an integer number (3111705).

Almost surely, 2^22404222 is an apocalyptic number.

22404222 is an abundant number, since it is smaller than the sum of its proper divisors (27383058).

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

22404222 is a wasteful number, since it uses less digits than its factorization.

22404222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414904 (or 414898 counting only the distinct ones).

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

The square root of 22404222 is about 4733.3098356224. The cubic root of 22404222 is about 281.9096587029.

Adding to 22404222 its reverse (22240422), we get a palindrome (44644644).

It can be divided in two parts, 2240422 and 2, that multiplied together give a palindrome (4480844).

The spelling of 22404222 in words is "twenty-two million, four hundred four thousand, two hundred twenty-two".