22222044 has 72 divisors (see below), whose sum is σ = 61213152. Its totient is φ = 6756480.

The previous prime is 22221977. The next prime is 22222049. The reversal of 22222044 is 44022222.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22222049) 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, 47974 + ... + 48434.

Almost surely, 2^22222044 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22222044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30606576).

22222044 is an abundant number, since it is smaller than the sum of its proper divisors (38991108).

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

22222044 is a wasteful number, since it uses less digits than its factorization.

22222044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 587 (or 582 counting only the distinct ones).

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

The square root of 22222044 is about 4714.0263045511. The cubic root of 22222044 is about 281.1434701730.

Adding to 22222044 its reverse (44022222), we get a palindrome (66244266).

The spelling of 22222044 in words is "twenty-two million, two hundred twenty-two thousand, forty-four".