18284 has 12 divisors (see below), whose sum is σ = 36624. Its totient is φ = 7824.

The previous prime is 18269. The next prime is 18287. The reversal of 18284 is 48281.

18284 is an admirable number.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (18287) by changing a digit.

18284 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 299 + ... + 354.

It is an arithmetic number, because the mean of its divisors is an integer number (3052).

2¹⁸²⁸⁴ is an apocalyptic number.

18284 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18284 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18312).

18284 is a wasteful number, since it uses less digits than its factorization.

18284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664 (or 662 counting only the distinct ones).

The product of its digits is 512, while the sum is 23.

The square root of 18284 is about 135.2183419511. The cubic root of 18284 is about 26.3445269224.

The spelling of 18284 in words is "eighteen thousand, two hundred eighty-four".