18127228 has 12 divisors (see below), whose sum is σ = 36254512. Its totient is φ = 7768800.

The previous prime is 18127217. The next prime is 18127247. The reversal of 18127228 is 82272181.

18127228 is an admirable number.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 18127228.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 323673 + ... + 323728.

Almost surely, 2^18127228 is an apocalyptic number.

It is an amenable number.

18127228 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18127228 is a wasteful number, since it uses less digits than its factorization.

18127228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647412 (or 647410 counting only the distinct ones).

The product of its digits is 3584, while the sum is 31.

The square root of 18127228 is about 4257.6082487707. The cubic root of 18127228 is about 262.6901563963.

The spelling of 18127228 in words is "eighteen million, one hundred twenty-seven thousand, two hundred twenty-eight".