Seoul is divided into 25 gu () (district). The ''gu'' vary greatly in area (from ) and population (from fewer than 140,000 to 630,000). Songpa has the most people, while Seocho has the largest area. The government of each gu handles many of the functions that are handled by city governments in other jurisdictions. Each ''gu'' is divided into "''dong''" () or neighborhoods. Some gu have only a few dong while others like Jongno District have a very large number of distinct neighborhoods. Gu of Seoul consist of 423 administrative dongs () in total. ''Dong'' are also sub-divided into 13,787 ''tong'' (), which are further divided into 102,796 ''ban'' in total.