639
641
The Number 640: Properties and Meanings
Prime Factors
of
640
=
2
x
2
x
2
x
2
x
2
x
2
x
2
x
5
.
640
is a
16-gonal Number
.
640
is a
108-gonal Number
.
The Year 640 AD
In the year
640
AD...
639
641