3986

3986 is a natural number that follows 3985 and precedes 3987. It appears in mathematics, science, and technical documentation as a convenient numeric identifier in various contexts.

Mathematically, 3986 is even and composite. Its prime factorization is 2 × 1993, with 1993 being a prime number. The sum of its decimal digits is 26, which means the number is not divisible by 3. Its magnitude places it well above smaller common constants and within the range of four-digit integers used in everyday counting and computation.

In numeral systems, 3986 converts to different representations as follows: binary 111110010010, octal 7622, and hexadecimal F92. In Roman numerals, it is written as MMMCMLXXXVI.

In computing and internet standards, the number 3986 is notable for its association with RFC 3986, the standard document titled Uniform Resource Identifier (URI): Generic Syntax. RFC 3986 defines the syntax and semantics of URIs, which are fundamental to how resources are identified and addressed on the World Wide Web. The presence of the number in RFC 3986 has given it recognition within software development, networking, and related technical fields and often appears in documentation and code examples.

Astronomy also uses sequential numeric designations for minor planets. Accordingly, 3986 is used as the numeric identifier for one such object in the catalog, reflecting the broad practice of naming celestial bodies by numbers once their orbits are confirmed.

See also: RFC 3986, URI syntax; minor planet designation system.