18428138 has 8 divisors (see below), whose sum is σ = 29097120. Its totient is φ = 8729100.

The previous prime is 18428131. The next prime is 18428141. The reversal of 18428138 is 83182481.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18428098 and 18428107.

It is not an unprimeable number, because it can be changed into a prime (18428131) 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 in 3 ways as a sum of consecutive naturals, for example, 242438 + ... + 242513.

It is an arithmetic number, because the mean of its divisors is an integer number (3637140).

Almost surely, 2^18428138 is an apocalyptic number.

18428138 is a deficient number, since it is larger than the sum of its proper divisors (10668982).

18428138 is a wasteful number, since it uses less digits than its factorization.

18428138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484972.

The product of its digits is 12288, while the sum is 35.

The square root of 18428138 is about 4292.8007174804. The cubic root of 18428138 is about 264.1357294866.

The spelling of 18428138 in words is "eighteen million, four hundred twenty-eight thousand, one hundred thirty-eight".