Bangladesh, officially the People's Republic of Bangladesh, is a country in South Asia. It is the eighth-most populous country in the world, with a population exceeding 162 million people. In terms of land mass, Bangladesh ranks 92nd, spanning 147,570 square kilometres (56,980 sq mi), making it one of the most densely-populated countries in the world. Bangladesh shares land borders with India to the west, north, and east, Myanmar to the southeast, and the Bay of Bengal to the south. It is narrowly separated from Nepal and Bhutan by the Siliguri Corridor, and from China by Sikkim, in the north, respectively. Dhaka, the capital and largest city, is the nation's economic, political and cultural hub. Chittagong, the largest sea port, is the second-largest city.