22200444 has 72 divisors (see below), whose sum is σ = 65895648. Its totient is φ = 6168960.

The previous prime is 22200443. The next prime is 22200449. The reversal of 22200444 is 44400222.

22200444 is a `hidden beast` number, since 2 + 220 + 0 + 444 = 666.

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

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22200443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8134 + ... + 10514.

Almost surely, 2^22200444 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 22200444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32947824).

22200444 is an abundant number, since it is smaller than the sum of its proper divisors (43695204).

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

22200444 is a wasteful number, since it uses less digits than its factorization.

22200444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2435 (or 2430 counting only the distinct ones).

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

The square root of 22200444 is about 4711.7347123963. The cubic root of 22200444 is about 281.0523494284.

Adding to 22200444 its reverse (44400222), we get a palindrome (66600666).

The spelling of 22200444 in words is "twenty-two million, two hundred thousand, four hundred forty-four".