XXXVI is the Roman numeral representation for the number 36. In the decimal system, it is the integer that follows 35 and precedes 37. Roman numerals are a numeral system originating from ancient Rome, using combinations of letters from the Latin alphabet. In mathematics, 36 is a composite number, meaning it has divisors other than 1 and itself. It can be factored into 6 × 6, making it a perfect square. Additionally, 36 is the sum of the first eight positive integers, which is a property of triangular numbers, related to the concept of triangular numbers.