22490244 has 96 divisors (see below), whose sum is σ = 67737600. Its totient is φ = 6320160.

The previous prime is 22490231. The next prime is 22490249. The reversal of 22490244 is 44209422.

It is a super-2 number, since 2×22490244² = 1011622150359072, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (22490249) 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 31 ways as a sum of consecutive naturals, for example, 53467 + ... + 53885.

It is an arithmetic number, because the mean of its divisors is an integer number (705600).

Almost surely, 2^22490244 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 22490244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33868800).

22490244 is an abundant number, since it is smaller than the sum of its proper divisors (45247356).

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

22490244 is a wasteful number, since it uses less digits than its factorization.

22490244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510 (or 502 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 22490244 is about 4742.3880060577. The cubic root of 22490244 is about 282.2699994432.

Adding to 22490244 its reverse (44209422), we get a palindrome (66699666).

The spelling of 22490244 in words is "twenty-two million, four hundred ninety thousand, two hundred forty-four".