18175228 has 12 divisors (see below), whose sum is σ = 32903640. Its totient is φ = 8774192.

The previous prime is 18175211. The next prime is 18175231. The reversal of 18175228 is 82257181.

It is a junction number, because it is equal to n+sod(n) for n = 18175193 and 18175202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78226 + ... + 78457.

It is an arithmetic number, because the mean of its divisors is an integer number (2741970).

Almost surely, 2^18175228 is an apocalyptic number.

It is an amenable number.

18175228 is a deficient number, since it is larger than the sum of its proper divisors (14728412).

18175228 is a wasteful number, since it uses less digits than its factorization.

18175228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156716 (or 156714 counting only the distinct ones).

The product of its digits is 8960, while the sum is 34.

The square root of 18175228 is about 4263.2414897587. The cubic root of 18175228 is about 262.9218155410.

The spelling of 18175228 in words is "eighteen million, one hundred seventy-five thousand, two hundred twenty-eight".