22440444 has 96 divisors (see below), whose sum is σ = 60775680. Its totient is φ = 6386688.

The previous prime is 22440437. The next prime is 22440449. The reversal of 22440444 is 44404422.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22440449) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 198532 + ... + 198644.

It is an arithmetic number, because the mean of its divisors is an integer number (633080).

Almost surely, 2^22440444 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 22440444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30387840).

22440444 is an abundant number, since it is smaller than the sum of its proper divisors (38335236).

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

22440444 is a wasteful number, since it uses less digits than its factorization.

22440444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219 (or 217 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 24.

The square root of 22440444 is about 4737.1345769357. The cubic root of 22440444 is about 282.0615026060.

Adding to 22440444 its reverse (44404422), we get a palindrome (66844866).

The spelling of 22440444 in words is "twenty-two million, four hundred forty thousand, four hundred forty-four".