18859228 has 12 divisors (see below), whose sum is σ = 33226200. Its totient is φ = 9366032.

The previous prime is 18859213. The next prime is 18859231. The reversal of 18859228 is 82295881.

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, 15226 + ... + 16417.

It is an arithmetic number, because the mean of its divisors is an integer number (2768850).

Almost surely, 2^18859228 is an apocalyptic number.

It is an amenable number.

18859228 is a deficient number, since it is larger than the sum of its proper divisors (14366972).

18859228 is a wasteful number, since it uses less digits than its factorization.

18859228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31796 (or 31794 counting only the distinct ones).

The product of its digits is 92160, while the sum is 43.

The square root of 18859228 is about 4342.7212666714. The cubic root of 18859228 is about 266.1795196489.

The spelling of 18859228 in words is "eighteen million, eight hundred fifty-nine thousand, two hundred twenty-eight".