Pakistan (i/ˈpækɨstæn/ or i/pɑːkiˈstɑːn/; Urdu: پاكِستان) (Urdu pronunciation: [paːkɪˈst̪aːn] ( listen)), officially the Islamic Republic of Pakistan (Urdu: اسلامی جمہوریۂ پاكِستان), is a sovereign country in South Asia. With a population exceeding 180 million people, it is the sixth most populous country in the world. Located at the crossroads of the strategically important regions of South Asia, Central Asia and Western Asia, Pakistan has a 1,046-kilometre (650 mi) coastline along the Arabian Sea and the Gulf of Oman in the south and is bordered by India to the east, Afghanistan to the west and north, Iran to the southwest and China in the far northeast. It is separated from Tajikistan by Afghanistan's narrow Wakhan Corridor in the north, and also shares a marine border with Oman.