22018228 has 6 divisors (see below), whose sum is σ = 38531906. Its totient is φ = 11009112.

The previous prime is 22018223. The next prime is 22018237. The reversal of 22018228 is 82281022.

It can be written as a sum of positive squares in only one way, i.e., 22014864 + 3364 = 4692^2 + 58^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22018223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2752275 + ... + 2752282.

Almost surely, 2^22018228 is an apocalyptic number.

It is an amenable number.

22018228 is a deficient number, since it is larger than the sum of its proper divisors (16513678).

22018228 is a wasteful number, since it uses less digits than its factorization.

22018228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5504561 (or 5504559 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 25.

The square root of 22018228 is about 4692.3584688299. The cubic root of 22018228 is about 280.2812989341.

The spelling of 22018228 in words is "twenty-two million, eighteen thousand, two hundred twenty-eight".