22740228 has 36 divisors (see below), whose sum is σ = 65694720. Its totient is φ = 6497136.

The previous prime is 22740227. The next prime is 22740241. The reversal of 22740228 is 82204722.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (22740227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44868 + ... + 45371.

Almost surely, 2^22740228 is an apocalyptic number.

22740228 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

22740228 is an abundant number, since it is smaller than the sum of its proper divisors (42954492).

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

22740228 is a wasteful number, since it uses less digits than its factorization.

22740228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90256 (or 90251 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 27.

The square root of 22740228 is about 4768.6715131156. The cubic root of 22740228 is about 283.3119793211.

The spelling of 22740228 in words is "twenty-two million, seven hundred forty thousand, two hundred twenty-eight".