In the previous week, the reserves had touched USD 411.124 billion after it rose by USD 1.758 billion.
The reserves had crossed the USD 400-billion mark for the first time in the week to September 8, 2017 but has since been fluctuating.
In the reporting week, foreign currency assets, a major component of the overall reserves, rose by USD 2.685 billion to USD 389.834 billion.
Gold reserves remained unchanged at USD 20.421 billion, the central bank said.
The special drawing rights with the International Monetary Fund rose by USD 6.2 million to USD 1.520 billion.
The country's reserve position with the Fund also increased by USD 9.3 million to USD 2.048 billion, RBI said.