18028735 has 4 divisors (see below), whose sum is σ = 21634488. Its totient is φ = 14422984.

The previous prime is 18028729. The next prime is 18028753. The reversal of 18028735 is 53782081.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18028735 - 2³ = 18028727 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18028735.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1802869 + ... + 1802878.

It is an arithmetic number, because the mean of its divisors is an integer number (5408622).

Almost surely, 2^18028735 is an apocalyptic number.

18028735 is a deficient number, since it is larger than the sum of its proper divisors (3605753).

18028735 is an equidigital number, since it uses as much as digits as its factorization.

18028735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3605752.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 18028735 is about 4246.0257888995. The cubic root of 18028735 is about 262.2135226920.

The spelling of 18028735 in words is "eighteen million, twenty-eight thousand, seven hundred thirty-five".