22249188 has 144 divisors (see below), whose sum is σ = 66407040. Its totient is φ = 6424704.

The previous prime is 22249187. The next prime is 22249217. The reversal of 22249188 is 88194222.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (22249187) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 419770 + ... + 419822.

It is an arithmetic number, because the mean of its divisors is an integer number (461160).

Almost surely, 2^22249188 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 22249188, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33203520).

22249188 is an abundant number, since it is smaller than the sum of its proper divisors (44157852).

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

22249188 is a wasteful number, since it uses less digits than its factorization.

22249188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115 (or 94 counting only the distinct ones).

The product of its digits is 18432, while the sum is 36.

The square root of 22249188 is about 4716.9044934151. The cubic root of 22249188 is about 281.2578948895.

The spelling of 22249188 in words is "twenty-two million, two hundred forty-nine thousand, one hundred eighty-eight".