Tonga (/ˈtɒŋə/ or /ˈtɒŋɡə/; Tongan: [ˈtoŋa] Puleʻanga Fakatuʻi ʻo Tonga), officially the Kingdom of Tonga, is a Polynesian sovereign state and archipelago comprising 169 islands of which 36 are inhabited. The total surface area is about 750 square kilometres (290 sq mi) scattered over 700,000 square kilometres (270,000 sq mi) of the southern Pacific Ocean. It has a population of 103,000 people of whom 70% reside on the main island of Tongatapu.