22744228 has 12 divisors (see below), whose sum is σ = 42864220. Its totient is φ = 10497312.

The previous prime is 22744223. The next prime is 22744247. The reversal of 22744228 is 82244722.

It can be written as a sum of positive squares in 2 ways, for example, as 3717184 + 19027044 = 1928^2 + 4362^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 22744228.

It is not an unprimeable number, because it can be changed into a prime (22744223) 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 3 ways as a sum of consecutive naturals, for example, 218643 + ... + 218746.

Almost surely, 2^22744228 is an apocalyptic number.

It is an amenable number.

22744228 is a deficient number, since it is larger than the sum of its proper divisors (20119992).

22744228 is a wasteful number, since it uses less digits than its factorization.

22744228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437406 (or 437404 counting only the distinct ones).

The product of its digits is 14336, while the sum is 31.

The square root of 22744228 is about 4769.0908986934. The cubic root of 22744228 is about 283.3285898475.

The spelling of 22744228 in words is "twenty-two million, seven hundred forty-four thousand, two hundred twenty-eight".