208

208 is a natural number that comes after 207 and before 209. It is even and composite, with prime factorization 2^4 × 13. Its divisors are 1, 2, 4, 8, 13, 16, 26, 52, 104, and 208.

In representations, 208 is written as CCVIII in Roman numerals; in binary it is 11010000; in hexadecimal it is D0; in octal it is 032.

In science, lead-208 is the heaviest stable isotope of lead and has a doubly magic nucleus (Z = 82, N = 126). This nucleus is a key example in nuclear structure studies because of its closed proton and neutron shells.

Historically, 208 CE was a leap year in the Julian calendar and falls within the era of the Severan dynasty in the Roman Empire.

In modern usage, 208 is the area code that covers the entire U.S. state of Idaho; in 2017 it gained an overlay code, 986, to handle increased demand. The number also appears in computing as HTTP status 208 Already Reported, a WebDAV-specific code. In character encoding, decimal 208 corresponds to the Latin-1 character Ð (Eth) in ISO-8859-1 and maps to U+00D0 in Unicode.