I Know My Numbers!

123456789
Across
  1. 2. 1010 more than 14190
  2. 4. greatest 8-digit even number
  3. 6. 66890 rounded off to the nearest 1000
  4. 7. successor of 8765420
  5. 9. smallest 7-digit number formed by using 7 different digits
Down
  1. 1. sum of the place value of 9 in 8967395
  2. 2. zero added to 1999999
  3. 3. 70 + 5 + 30000 + 600 + 8000
  4. 5. XV + LV
  5. 8. Hindu-Arabic numeral for MMDXX