18782228 has 12 divisors (see below), whose sum is σ = 33633600. Its totient is φ = 9172632.

The previous prime is 18782219. The next prime is 18782233. The reversal of 18782228 is 82228781.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 18782191 and 18782200.

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, 54428 + ... + 54771.

It is an arithmetic number, because the mean of its divisors is an integer number (2802800).

Almost surely, 2^18782228 is an apocalyptic number.

It is an amenable number.

18782228 is a deficient number, since it is larger than the sum of its proper divisors (14851372).

18782228 is a wasteful number, since it uses less digits than its factorization.

18782228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109246 (or 109244 counting only the distinct ones).

The product of its digits is 28672, while the sum is 38.

The square root of 18782228 is about 4333.8467900931. The cubic root of 18782228 is about 265.8167656615.

The spelling of 18782228 in words is "eighteen million, seven hundred eighty-two thousand, two hundred twenty-eight".