larger number puzzle

1234
Across
  1. 3. Successor of largest 8-digit number=____________
  2. 4. Smallest number formed by digits: 8,5,0,1,9,6,0,2=___________
Down
  1. 1. Three Hundred Million + Five Hundred Thousand+ Eight Hundred + Nine Tens=_________
  2. 2. 5hundred million = ________ Crores
  3. 3. In an International place value chart when you move from Hundred thousands to Ten millions place then the value of digit increases by _________Times.