The number "304" is often recognized as a three-digit integer that follows 303 and precedes 305. In mathematics, it is classified as an even number because it is divisible by 2. Additionally, 304 can be expressed in Roman numerals as "CCCIV." In the context of area codes, 304 is the telephone area code for the state of West Virginia in the United States. This area code was established in 1947 and covers the entire state, serving both urban and rural regions.