18412228 has 12 divisors (see below), whose sum is σ = 32438700. Its totient is φ = 9144032.

The previous prime is 18412201. The next prime is 18412237. The reversal of 18412228 is 82221481.

It can be written as a sum of positive squares in 2 ways, for example, as 4334724 + 14077504 = 2082^2 + 3752^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18412196 and 18412205.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14851 + ... + 16042.

It is an arithmetic number, because the mean of its divisors is an integer number (2703225).

Almost surely, 2^18412228 is an apocalyptic number.

It is an amenable number.

18412228 is a deficient number, since it is larger than the sum of its proper divisors (14026472).

18412228 is a wasteful number, since it uses less digits than its factorization.

18412228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31046 (or 31044 counting only the distinct ones).

The product of its digits is 2048, while the sum is 28.

The square root of 18412228 is about 4290.9472147767. The cubic root of 18412228 is about 264.0596934193.

The spelling of 18412228 in words is "eighteen million, four hundred twelve thousand, two hundred twenty-eight".