22443228 has 18 divisors (see below), whose sum is σ = 56731584. Its totient is φ = 7481064.

The previous prime is 22443139. The next prime is 22443229. The reversal of 22443228 is 82234422.

22443228 is a `hidden beast` number, since 224 + 432 + 2 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22443229) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 311676 + ... + 311747.

Almost surely, 2^22443228 is an apocalyptic number.

It is an amenable number.

22443228 is an abundant number, since it is smaller than the sum of its proper divisors (34288356).

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

22443228 is a wasteful number, since it uses less digits than its factorization.

22443228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623433 (or 623428 counting only the distinct ones).

The product of its digits is 6144, while the sum is 27.

The square root of 22443228 is about 4737.4284163457. The cubic root of 22443228 is about 282.0731664684.

The spelling of 22443228 in words is "twenty-two million, four hundred forty-three thousand, two hundred twenty-eight".