22355228 has 24 divisors (see below), whose sum is σ = 45327072. Its totient is φ = 9448704.

The previous prime is 22355171. The next prime is 22355237. The reversal of 22355228 is 82255322.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 22355228.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3425 + ... + 7512.

It is an arithmetic number, because the mean of its divisors is an integer number (1888628).

Almost surely, 2^22355228 is an apocalyptic number.

22355228 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

22355228 is an abundant number, since it is smaller than the sum of its proper divisors (22971844).

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

22355228 is a wasteful number, since it uses less digits than its factorization.

22355228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11021 (or 11019 counting only the distinct ones).

The product of its digits is 9600, while the sum is 29.

The square root of 22355228 is about 4728.1315548534. The cubic root of 22355228 is about 281.7040135035.

The spelling of 22355228 in words is "twenty-two million, three hundred fifty-five thousand, two hundred twenty-eight".