Russia or the Russian Federation, is a transcontinental country spanning Eastern Europe and Northern Asia. It is the largest country in the world by area, covering over 17,125,191 square kilometres (6,612,073 sq mi), and encompassing one-eighth of Earth's inhabitable landmass. Russia extends across eleven time zones and borders sixteen sovereign nations, the most of any country in the world. It is the ninth-most populous country and the most populous country in Europe, with a population of 145.5 million. The country's capital and largest city is Moscow, the largest city entirely within Europe. Saint Petersburg is Russia's cultural centre and second-largest city. Other major urban areas include Novosibirsk, Yekaterinburg, Nizhny Novgorod and Kazan.