8000

8000 is the natural number following 7999 and preceding 8001. It is an even composite number with prime factorization 2^6 × 5^3. It is a perfect cube, since 20^3 = 8000. In base-10 representation, 8000 ends with three zeros, making it a round number used in calculations and measurements. The number has 28 positive divisors, arising from (6+1)(3+1).

Historically, 8000 BCE marks an early stage in the Neolithic Revolution. In several regions, communities began to adopt agriculture and animal domestication, leading to more permanent settlements. In the Near East, the beginnings of farming around this time contributed to societal changes, while in other regions such as East Asia and Europe similar transitions occurred later. Archaeological sites from this era show early tools, pottery, and varied subsistence strategies.

In contemporary contexts, 8000 appears in technology and notation. In hexadecimal, 8000 decimal equals 0x1F40. In computing, 8 kilobytes is often rounded as 8000 bytes by decimal definitions in certain contexts; in binary use, 8192 bytes (8 KiB) is more common. The number is also frequently used as a port designation; TCP/UDP port 8000 is commonly assigned for development servers and web applications. In Roman numerals, large values can be written with vincula; 8000 may be rendered as V̄MMM, combining V̄ for 5000 and MMM for 3000.