[PL\SQL] Convert seconds to Day hour : min : sec

variable vSec number;
exec :vSec := 68400;
SELECT
to_char(trunc(:vSec / 60 / 60 / 24), '09') || ' [day]' ||
to_char(trunc(MOD(:vSec / 60 / 60, 24)), '09') ||' [hh24]' ||
to_char(trunc(MOD(:vSec, 3600) / 60), '09') || ' [mi]' ||
to_char(MOD(MOD(:vSec, 3600), 60), '09') || ' [ss]'
FROM dual;