DCLXCVIII is a Roman numeral that represents the number 698. In this numeral, "D" stands for 500, "C" for 100, "L" for 50, "X" for 10, "V" for 5, and "III" for 3. When combined, these values add up to 698. Roman numerals are a numeral system originating from ancient Rome. They use combinations of letters from the Latin alphabet to signify values. This system was widely used throughout the Roman Empire and is still used today in various contexts, such as clock faces and the naming of monarchs and popes.