Convert a number to a time format

[newyork66]

Database column is a number ( It's actually a total milliseconds)
To be meaningful to the business, we need to display this as hh:mm:ss  (hh - hours, mm - minutes, ss - seconds). Ms / 1000 = Seconds. Seconds / 60 = Minutes (integer) + Seconds (remainder). Minutes / 60 = Hours (integer) + Minutes (remainder). No decimal places. So, 2,022,523 = 33:42 (no hours).
How can I achieve these in Cognos Report Studio?

[m23]

I would do it like this..

trunc(2022523/3600000)||':'||trunc(mod(2022523,3600000)/60000)||':'||trunc(mod(mod(2022523,3600000),60000)/1000)

trunc is an oracle function that just gets rid of the decimals. If your database isn't oracle using whatever your database has to round down to the nearest whole number would do the same thing. Someone may correct me but I don't think Cognos has any inbuilt function for rounding down.