A few of the many things to control with numbers in Max

MIDI pitch and velocity:
noteout, makenote

MIDI pitch bend:
bendout

MIDI volume:
ctlout (7)

MIDI program:
pgmout

MSP volume:
*~

MSP playback rate:
sfplay~, groove~, etc.

MSP frequency:
cycle~, phasor~, etc.

MSP delay time:
tapout~

MSP filter frequency and Q:
lores~, reson~, etc.

graphic object size, color, and location:
jit.lcd

video brightness, contrast, and saturation:
jit.brcosa

video zoom, offset, and rotation:
jit.rota

video playback rate:
jit.qt.movie (rate)

video frame:
jit.qt.movie (frame)

video volume:
jit.qt.movie (vol)

etc., etc., etc.