18673228 has 12 divisors (see below), whose sum is σ = 37346512. Its totient is φ = 8002800.

The previous prime is 18673211. The next prime is 18673229. The reversal of 18673228 is 82237681.

18673228 is an admirable number.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (18673229) by changing a digit.

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, 333423 + ... + 333478.

Almost surely, 2^18673228 is an apocalyptic number.

It is an amenable number.

18673228 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18673228 is a wasteful number, since it uses less digits than its factorization.

18673228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666912 (or 666910 counting only the distinct ones).

The product of its digits is 32256, while the sum is 37.

The square root of 18673228 is about 4321.2530590096. The cubic root of 18673228 is about 265.3015577435.

The spelling of 18673228 in words is "eighteen million, six hundred seventy-three thousand, two hundred twenty-eight".