22166444 has 6 divisors (see below), whose sum is σ = 38791284. Its totient is φ = 11083220.

The previous prime is 22166383. The next prime is 22166447. The reversal of 22166444 is 44466122.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (22166447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2770802 + ... + 2770809.

It is an arithmetic number, because the mean of its divisors is an integer number (6465214).

Almost surely, 2^22166444 is an apocalyptic number.

It is an amenable number.

22166444 is a deficient number, since it is larger than the sum of its proper divisors (16624840).

22166444 is a wasteful number, since it uses less digits than its factorization.

22166444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5541615 (or 5541613 counting only the distinct ones).

The product of its digits is 9216, while the sum is 29.

The square root of 22166444 is about 4708.1253169388. The cubic root of 22166444 is about 280.9087988120.

The spelling of 22166444 in words is "twenty-two million, one hundred sixty-six thousand, four hundred forty-four".