18028755 has 24 divisors (see below), whose sum is σ = 33089472. Its totient is φ = 9049344.

The previous prime is 18028753. The next prime is 18028783. The reversal of 18028755 is 55782081.

It is not a de Polignac number, because 18028755 - 2¹ = 18028753 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18028753) 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 23 ways as a sum of consecutive naturals, for example, 11019 + ... + 12548.

It is an arithmetic number, because the mean of its divisors is an integer number (1378728).

Almost surely, 2^18028755 is an apocalyptic number.

18028755 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18028755 is a deficient number, since it is larger than the sum of its proper divisors (15060717).

18028755 is a wasteful number, since it uses less digits than its factorization.

18028755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23595 (or 23592 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 36.

The square root of 18028755 is about 4246.0281440424. The cubic root of 18028755 is about 262.2136196533.

The spelling of 18028755 in words is "eighteen million, twenty-eight thousand, seven hundred fifty-five".