18228268 has 12 divisors (see below), whose sum is σ = 32258520. Its totient is φ = 9011552.

The previous prime is 18228263. The next prime is 18228281. The reversal of 18228268 is 86282281.

It is not an unprimeable number, because it can be changed into a prime (18228263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25246 + ... + 25957.

It is an arithmetic number, because the mean of its divisors is an integer number (2688210).

Almost surely, 2^18228268 is an apocalyptic number.

It is an amenable number.

18228268 is a deficient number, since it is larger than the sum of its proper divisors (14030252).

18228268 is a wasteful number, since it uses less digits than its factorization.

18228268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51296 (or 51294 counting only the distinct ones).

The product of its digits is 24576, while the sum is 37.

The square root of 18228268 is about 4269.4575767889. The cubic root of 18228268 is about 263.1773250299.

It can be divided in two parts, 18228 and 268, that added together give a square (18496 = 136²).

The spelling of 18228268 in words is "eighteen million, two hundred twenty-eight thousand, two hundred sixty-eight".