18338128 has 10 divisors (see below), whose sum is σ = 35530154. Its totient is φ = 9169056.

The previous prime is 18338113. The next prime is 18338129. The reversal of 18338128 is 82183381.

It can be written as a sum of positive squares in only one way, i.e., 16064064 + 2274064 = 4008^2 + 1508^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18338093 and 18338102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18338129) by changing a digit.

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 as a sum of consecutive naturals, namely, 573051 + ... + 573082.

Almost surely, 2^18338128 is an apocalyptic number.

It is an amenable number.

18338128 is a deficient number, since it is larger than the sum of its proper divisors (17192026).

18338128 is a wasteful number, since it uses less digits than its factorization.

18338128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1146141 (or 1146135 counting only the distinct ones).

The product of its digits is 9216, while the sum is 34.

The square root of 18338128 is about 4282.3040527268. The cubic root of 18338128 is about 263.7049811230.

The spelling of 18338128 in words is "eighteen million, three hundred thirty-eight thousand, one hundred twenty-eight".