18228292 has 12 divisors (see below), whose sum is σ = 32578560. Its totient is φ = 8920136.

The previous prime is 18228281. The next prime is 18228293. The reversal of 18228292 is 29282281.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (18228293) 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, 48292 + ... + 48667.

It is an arithmetic number, because the mean of its divisors is an integer number (2714880).

Almost surely, 2^18228292 is an apocalyptic number.

It is an amenable number.

18228292 is a deficient number, since it is larger than the sum of its proper divisors (14350268).

18228292 is a wasteful number, since it uses less digits than its factorization.

18228292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97010 (or 97008 counting only the distinct ones).

The product of its digits is 9216, while the sum is 34.

The square root of 18228292 is about 4269.4603874494. The cubic root of 18228292 is about 263.1774405328.

The spelling of 18228292 in words is "eighteen million, two hundred twenty-eight thousand, two hundred ninety-two".