18382228 has 12 divisors (see below), whose sum is σ = 32696692. Its totient is φ = 9040320.

The previous prime is 18382223. The next prime is 18382261. The reversal of 18382228 is 82228381.

It can be written as a sum of positive squares in 2 ways, for example, as 4334724 + 14047504 = 2082^2 + 3748^2 .

It is a hoax number, since the sum of its digits (34) 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 = 18382193 and 18382202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18382223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37425 + ... + 37912.

Almost surely, 2^18382228 is an apocalyptic number.

It is an amenable number.

18382228 is a deficient number, since it is larger than the sum of its proper divisors (14314464).

18382228 is a wasteful number, since it uses less digits than its factorization.

18382228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75402 (or 75400 counting only the distinct ones).

The product of its digits is 12288, while the sum is 34.

The square root of 18382228 is about 4287.4500580182. The cubic root of 18382228 is about 263.9162000632.

The spelling of 18382228 in words is "eighteen million, three hundred eighty-two thousand, two hundred twenty-eight".