Indonesia is a country in Southeast Asia and Oceania. Indonesia has 17,508 islands and 33 provinces. a population of around 230 million people, it is the world's fourth most populous country, and has the world's largest population of moeslem peoples. The Indonesian archipelago has been an important trade region since at least the seventh century, when Sriwijaya and then later Majapahit traded with China and India. Local rulers gradually adopted Indian cultural, religious and political models from the early centuries CE, and Hindu and Buddhist kingdoms flourished.