The number 30 is classified as a composite number because it has more than two distinct positive divisors. Specifically, its divisors are 1, 2, 3, 5, 6, 10, 15, and 30. This means that 30 can be divided evenly by these numbers, unlike prime numbers, which have only two divisors: 1 and themselves. In addition to being composite, 30 is also an abundant number, meaning the sum of its proper divisors (1, 2, 3, 5, 6, 10, and 15) exceeds the number itself. The number is often associated with triangles because it is the sum of the first four positive integers (1 + 2 + 3 + 4 = 10), and it is also the product of the first three prime numbers: 2, 3, and 5.