A perfect number is a positive integer that is equal to the sum of its proper divisors, excluding itself. The number 28 is considered a perfect number because its divisors (1, 2, 4, 7, and 14) add up to 28.
Here’s how it works:
- 1 + 2 + 4 + 7 + 14 = 28
This property makes 28 a perfect number. The concept of perfect numbers dates back to ancient Greek mathematics, and they have fascinated mathematicians for centuries. The next perfect number after 28 is 496.