22166844 has 144 divisors (see below), whose sum is σ = 67592448. Its totient is φ = 5515776.

The previous prime is 22166843. The next prime is 22166899. The reversal of 22166844 is 44866122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22166843) 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 in 47 ways as a sum of consecutive naturals, for example, 515487 + ... + 515529.

It is an arithmetic number, because the mean of its divisors is an integer number (469392).

Almost surely, 2^22166844 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 22166844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33796224).

22166844 is an abundant number, since it is smaller than the sum of its proper divisors (45425604).

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

22166844 is a wasteful number, since it uses less digits than its factorization.

22166844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112 (or 91 counting only the distinct ones).

The product of its digits is 18432, while the sum is 33.

The square root of 22166844 is about 4708.1677965000. The cubic root of 22166844 is about 280.9104884958.

The spelling of 22166844 in words is "twenty-two million, one hundred sixty-six thousand, eight hundred forty-four".