Indonesia, officially the Republic of Indonesia, is a transcontinental country in Southeast Asia and Oceania between the Indian and Pacific oceans. It consists of over seventeen thousand islands, including Sumatra, Java, Sulawesi, and parts of Borneo and New Guinea. Indonesia is the world's largest island country and the 14th-largest country by area, at 1,904,569 square kilometres. With about 270 million people, Indonesia is the world's fourth-most populous country and the most populous Muslim-majority country. Java, the world's most populous island, is home to more than half of the country's population.