Jakarta, officially the Special Capital Region of Jakarta, is the de facto capital and largest city of Indonesia, with administrative status equivalent to a province. It lies on the northwestern coast of Java, borders the provinces of West Java and Banten, and faces the Java Sea to the north. Jakarta itself covers about 662 square kilometres, but the wider Jakarta metropolitan area—locally known as Jabodetabek—is among the largest urban agglomerations in the world by area. By population, Greater Jakarta is the most populous urban area in the world with a population of over 40 million. Jakarta is Indonesia's political, economic, and cultural centre and contains many national institutions, corporate headquarters, and the secretariat of the Association of Southeast Asian Nations (ASEAN).