The name Indonesia has its roots in two Greek words: "Indos" meaning Indian and "Nesos" which means islands. It is an appropriate description of the archipelago as there are estimated to be a total of 17,508 islands, of which only about 6,000 are inhabited, stretching for 5,150 km between the Australian and Asian continental mainlands and dividing the Pacific and Indian Oceans at the Equator. Five main islands and 30 smaller archipelagoes are home to the majority of the population. The islands and people of Indonesia constitute the fourth most populated nation in the world. As a democratic republic, Indonesia is divided into 32 provinces, special territories and classified geographically into four groups. First are the Greater Sundas, made up of the larger islands of Sumatra, Java, Kalimantan and Sulawesi. Second are the Lesser Sundas, consisting of smaller islands from Bali eastward to Timor. Third is Maluku which includes all the islands between Irian Jaya and Sulawesi. The fourth and final group is lrian Jaya in the extreme eastern part of the country.