SELECT REPLACE(CONVERT(VARCHAR,CAST(YourIntColumn AS MONEY),1), '.00','')

declare @days int, @text varchar(20)
set @days = 1890

select @days,substring(convert(varchar(20),cast(cast(@days as float) as money),1),1,charindex('.',convert(varchar(20),cast(cast(@days as float) as money),1))-1)

declare @days int;
set @days = 1234567890;

select 
	case len(@days)
		when 10 then stuff(stuff(stuff(cast(@days as varchar(10)), 2, 0, ','), 6, 0, ','), 10, 0, ',')
		when 9 then stuff(stuff(cast(@days as varchar(10)), 4, 0, ','), 8, 0, ',')
		when 8 then stuff(stuff(cast(@days as varchar(10)), 3, 0, ','), 7, 0, ',')
		when 7 then stuff(stuff(cast(@days as varchar(10)), 2, 0, ','), 6, 0, ',')
		when 6 then stuff(cast(@days as varchar(10)), 4, 0, ',')
		when 5 then stuff(cast(@days as varchar(10)), 3, 0, ',')
		when 4 then stuff(cast(@days as varchar(10)), 2, 0, ',')
		else cast(@days as varchar(10))
	end
;