Hello,

We can use the below formula to predict your rank

100 - your total percentile score is the percentage  of people ahead of you. 869010 are the number of candidates appeared for Jan exam. So rank formula is (100 - your total score) X 869010 /100. If the number of candidates for April exam increased to 1200000 then your final rank shall be (100 - your total score) X 1200000/100

Your predict score will be 27808 but this is approximate rank and it may change after april attempt

But with your present rank as you haven't mentioned your category or state its difficult to tell you about which colleges you might get. Please click the below link to use the college predictor to predict what college you might get

https://engineering.careers360.com/jee-main-college-predictor?ici=cp-listing_engineering&icn=JEE-Main-College-Predictor