18052228 has 6 divisors (see below), whose sum is σ = 31591406. Its totient is φ = 9026112.

The previous prime is 18052219. The next prime is 18052267. The reversal of 18052228 is 82225081.

It can be written as a sum of positive squares in only one way, i.e., 18045504 + 6724 = 4248^2 + 82^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18052196 and 18052205.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2256525 + ... + 2256532.

Almost surely, 2^18052228 is an apocalyptic number.

It is an amenable number.

18052228 is a deficient number, since it is larger than the sum of its proper divisors (13539178).

18052228 is a wasteful number, since it uses less digits than its factorization.

18052228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4513061 (or 4513059 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 18052228 is about 4248.7913575510. The cubic root of 18052228 is about 262.3273688839.

The spelling of 18052228 in words is "eighteen million, fifty-two thousand, two hundred twenty-eight".