Row filter od datable with integer value

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VB

Hello experts

Row filter of datable

Dim i As Int16 = Convert.ToInt32(Dt.Rows(Dt.Rows.Count - 1)("Column1"))
  dv.RowFilter = "Total<='" + i + "'"

i is an integer value but the above statement throws me error input string was not in correct format.
However,

dv.RowFilter = "Total<=8"

This statement works perfectly fine. why not with i Could someone please tell the solution
It must be something very simple but nothing is top of my head now

What I have tried:

Row filter of databale with values hard coded or static values ...