Malaysia is a country in Southeast Asia consisting of thirteen states and three Federal Territories, with a total landmass of 329,845 square kilometres (127,354 sq mi). The capital city is Kuala Lumpur, while Putrajaya is the seat of the federal government. The population stands at over 28 million. The country is separated by the South China Sea into two regions, Peninsular Malaysia and Malaysian Borneo (also known as East Malaysia). Malaysia borders Thailand, Indonesia, Singapore and Brunei. It is near the equator and has a tropical climate. Malaysia's head of state is the Yang di-Pertuan Agong, an elected monarch, and the head of government is the Prime Minister. The government is closely modelled on the Westminster parliamentary system.