18352228 has 12 divisors (see below), whose sum is σ = 32863600. Its totient is φ = 8962632.

The previous prime is 18352223. The next prime is 18352237. The reversal of 18352228 is 82225381.

It is a self number, because there is not a number n which added to its sum of digits gives 18352228.

It is not an unprimeable number, because it can be changed into a prime (18352223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53178 + ... + 53521.

Almost surely, 2^18352228 is an apocalyptic number.

It is an amenable number.

18352228 is a deficient number, since it is larger than the sum of its proper divisors (14511372).

18352228 is a wasteful number, since it uses less digits than its factorization.

18352228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106746 (or 106744 counting only the distinct ones).

The product of its digits is 7680, while the sum is 31.

The square root of 18352228 is about 4283.9500463941. The cubic root of 18352228 is about 263.7725505003.

The spelling of 18352228 in words is "eighteen million, three hundred fifty-two thousand, two hundred twenty-eight".