4 (number)

The number 4 is a natural number that follows 3 and precedes 5. It is an integer, an even number, and can be represented in various ways in mathematics, such as in Roman numerals (IV), in binary (100), and in hexadecimal (4). It is commonly used in counting, measuring, and various arithmetic operations. Additionally, 4 has significance in various contexts, including geometry (e.g., a quadrilateral has four sides), science (e.g.