22206444 has 48 divisors (see below), whose sum is σ = 56109312. Its totient is φ = 6795072.

The previous prime is 22206433. The next prime is 22206449. The reversal of 22206444 is 44460222.

It is not an unprimeable number, because it can be changed into a prime (22206449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43897 + ... + 44399.

It is an arithmetic number, because the mean of its divisors is an integer number (1168944).

Almost surely, 2^22206444 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 22206444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28054656).

22206444 is an abundant number, since it is smaller than the sum of its proper divisors (33902868).

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

22206444 is a wasteful number, since it uses less digits than its factorization.

22206444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 806 (or 804 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 22206444 is about 4712.3713775550. The cubic root of 22206444 is about 281.0776666728.

Adding to 22206444 its reverse (44460222), we get a palindrome (66666666).

The spelling of 22206444 in words is "twenty-two million, two hundred six thousand, four hundred forty-four".