0985

0985 is a four-digit numeral that, in decimal notation, represents the value 985. In arithmetic terms, 985 is a composite number with prime factorization 5 × 197. The sum of its decimal digits is 22, and it is not a perfect power.

In different numeral systems, 985 converts to binary 1111011001, octal 1731, and hexadecimal 3D9. In Roman numerals it is written as CMLXXXV. The form 0985, with a leading zero, is often used in fixed-width formatting or identifiers. In computing, a leading zero may indicate octal notation in some programming languages, but 0985 is not a valid octal constant in those contexts because octal digits are 0–7; accordingly, 0985 is typically rejected or treated as a decimal string depending on the language or parser. In data storage or software interfaces, 0985 may be preserved as a string to maintain width or leading zeros.

As a calendar year, 985 CE falls in the late 10th century of the Common Era. In historical references, events associated with this year are region-specific and depend on the historical record.

In modern usage, 0985 commonly appears as a code, model number, or identifier in inventories, catalogs, or serial schemes, where fixed-width formatting with leading zeros helps with sorting and alignment.