18875228 has 12 divisors (see below), whose sum is σ = 33341112. Its totient is φ = 9349200.

The previous prime is 18875191. The next prime is 18875231. The reversal of 18875228 is 82257881.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21623 + ... + 22478.

It is an arithmetic number, because the mean of its divisors is an integer number (2778426).

Almost surely, 2^18875228 is an apocalyptic number.

It is an amenable number.

18875228 is a deficient number, since it is larger than the sum of its proper divisors (14465884).

18875228 is a wasteful number, since it uses less digits than its factorization.

18875228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44212 (or 44210 counting only the distinct ones).

The product of its digits is 71680, while the sum is 41.

The square root of 18875228 is about 4344.5630390178. The cubic root of 18875228 is about 266.2547731443.

The spelling of 18875228 in words is "eighteen million, eight hundred seventy-five thousand, two hundred twenty-eight".