The expenditure on advertisements from April 2014 to October 2017 through electronic, print media and outdoor publicity is Rs 37,54,06,23,616, according to the RTI reply by the Information and Broadcasting Ministry.
The application was filed by Greater Noida-based social activist Ramveer Tanwar, a copy of which is with news agency IANS.
According to the information, the central government spent over Rs 1,656 crore on electronic media advertisements, including -- community radio, digital cinema, Doordarshan, Internet, SMS and TV.
For print media, the government spent more than Rs 1,698 crore.
On outdoor advertisements, which include hoardings, posters, booklets and calendars, the central government has spent over Rs 399 crore, the RTI reveals.
The amount spent on publicity blitz is more than the yearly budget allocated to some key ministries and government's flagship programmes. The government's allocation for "pollution abatement" in the last three years has been only Rs 56.8 crore.
In 2016, an RTI filed by Mr Tanwar had revealed that the Centre spent over Rs 1,100 crore between June 1, 2014 and August 31, 2016, on advertisements featuring Prime Minister Narendra Modi.
The Ministry gave a breakup of the expenditure according to which Rs 448 crore was spent from June 1, 2014 to March 31, 2015, and Rs 542 crore and Rs 120 crore spent from April 1, 2015 to March 31, 2016 and April 1, 2016 to August 31, 2016 respectively.
The expenditure was only for television, Internet and other electronic media and did not include expenditure on outdoor and print advertisements.
In 2015, another RTI had revealed that the Centre had spent nearly Rs 8.5 crore on newspaper advertisements for the Prime Minister's monthly radio address "Mann Ki Baat" till July 2015.
The BJP and Congress had criticised the Aam Aadmi Party (AAP) government in Delhi for spending Rs 526 crore on advertising its achievements in 2015.