More than 823,000 people signed up for Obamacare last week through healthcare.gov, bringing the total so far for open enrollment to 3.6 million.

The total number of sign-ups last week was 823,180. The enrollment numbers though show a major task ahead as the deadline to pick plans expires on Dec. 15. Last year more than 13 million people signed up for Obamacare, but that open enrollment period ended on Jan. 31.

The figures do not take into account state-run exchanges. It shows the number of people that signed up on healthcare.gov, which residents in 39 states and the District of Columbia use to pick Obamacare plans.

The number that signed up was more than the 504,181 that signed up in last week's report, which covered the week of Nov. 19-25.

There were 271,207 new customers and 551,973 returning customers on healthcare.gov during Nov. 26-Dec. 2.

The number of sign-ups is outpacing the same figure over roughly the same time period about a year ago.

About 2.9 million people picked plans on healthcare.gov as of Dec. 3, 2016, according to federal figures.

But that enrollment period ended on Jan. 31, and 9.2 million people picked plans on healthcare.gov for the 2017 coverage year.

That means the pace of Obamacare sign-ups may have to quicken to reach last year’s numbers for the 2018 coverage year. The deadline to sign up for plans on healthcare.gov is Dec. 15.

The Trump administration decided to shorten the enrollment period by six weeks. Obamacare allies and Democrats charged the move was an act of “sabotage” by the administration to help dismantle the law.

While the deadline to buy plans on healthcare.gov ends on Jan. 31, several states that run their own exchanges have a later enrollment deadline. For instance, California’s open enrollment deadline goes to Jan. 31.