CDXXVIII

CDXXVIII is the Roman numeral representing the integer 428. It is formed by combining CD (400) with XX (20) and VIII (8). The CD portion uses subtractive notation, where C (100) placed before D (500) denotes 400, while XX and VIII add 20 and 8 to reach 428. In standard practice, numerals are written from largest to smallest, using subtractive pairs to avoid long sequences of identical symbols.

Roman numerals originated in ancient Rome and remained common throughout Europe for many centuries. Although Arabic numerals are now dominant for most counting and calculation, Roman numerals are still used in certain contexts. They frequently appear on clock faces, in the numbering of chapters or volumes, in the naming of monarchs and popes, and in various inscriptions or ceremonial markings. The numeral CDXXVIII can be encountered in historical documents or artifacts that aim to reflect classical notation.

As a label or marker, 428 may also be used in lists, sequence numbering, or decorative contexts where traditional typography is preferred. Understanding CDXXVIII provides a concise example of subtractive and additive elements in Roman numerals and illustrates how a larger value is built from smaller components within the system.