22220444 has 12 divisors (see below), whose sum is σ = 39433968. Its totient is φ = 10953600.

The previous prime is 22220431. The next prime is 22220447. The reversal of 22220444 is 44402222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22220447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38837 + ... + 39404.

It is an arithmetic number, because the mean of its divisors is an integer number (3286164).

Almost surely, 2^22220444 is an apocalyptic number.

It is an amenable number.

22220444 is a deficient number, since it is larger than the sum of its proper divisors (17213524).

22220444 is a wasteful number, since it uses less digits than its factorization.

22220444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78316 (or 78314 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

The square root of 22220444 is about 4713.8565951883. The cubic root of 22220444 is about 281.1367225137.

Adding to 22220444 its reverse (44402222), we get a palindrome (66622666).

The spelling of 22220444 in words is "twenty-two million, two hundred twenty thousand, four hundred forty-four".