18028365 has 16 divisors (see below), whose sum is σ = 28909248. Its totient is φ = 9593856.

The previous prime is 18028363. The next prime is 18028369. The reversal of 18028365 is 56382081.

It is a happy number.

It is not a de Polignac number, because 18028365 - 2¹ = 18028363 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18028363) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7614 + ... + 9696.

It is an arithmetic number, because the mean of its divisors is an integer number (1806828).

Almost surely, 2^18028365 is an apocalyptic number.

18028365 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18028365 is a deficient number, since it is larger than the sum of its proper divisors (10880883).

18028365 is a wasteful number, since it uses less digits than its factorization.

18028365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2668.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 18028365 is about 4245.9822185214. The cubic root of 18028365 is about 262.2117288951.

The spelling of 18028365 in words is "eighteen million, twenty-eight thousand, three hundred sixty-five".