Norway (i/ˈnɔrweɪ/; Norwegian: Norge (Bokmål) or Noreg (Nynorsk)), officially the Kingdom of Norway, is a Scandinavian unitary constitutional monarchy whose territory comprises the western portion of the Scandinavian Peninsula, Jan Mayen, the Arctic archipelago of Svalbard and the subantarctic Bouvet Island. Norway has a total area of 385,252 square kilometres (148,747 sq mi) and a population of about 5 million. It is the second least densely populated country in Europe. The country shares a long border with Sweden (1,619 km long) that it is the longest uninterrupted border within both Europe and Schengen Area; it is also bordered by Finland and Russia to the north-east; in its south Norway borders the Skagerrak Strait across from Denmark. It shares maritime borders with Russia by the Barents sea, Greenland, Faroe Islands and Iceland by the Norwegian Sea, Sweden, Denmark and United Kingdom by the North Sea. The capital city of Norway is Oslo. Norway's extensive coastline, facing the North Atlantic Ocean and the Barents Sea, is home to its famous fjords.