 ), up from 627,734 recorded in the 2010 Census, making it the nineteenth-largest city in Russia and the largest in the republic.From 1984 to 1987, the city was called Ustinov (), named after late Soviet Minister of Defence Dmitry Ustinov The city is a major hub of industry, commerce, politics, culture and education in the Volga Region.It is famous for its defense, engineering and metallurgy industries.