Number 640

Representations of 640
Greek numeral
χμ
Arabic numeral
٦٤٠
Roman numeral
DCXL
Maya numeral
●
●●
▃▃▃▃▃
▃▃▃▃▃
ↂ
Chinese numeral
六百四十
Hebrew numeral
תרמ
640 in different numeral systems
Binary
1010000000
Base-3
212201
Base-4
22000
Base-5
10030
Base-6
2544
Base-7
1603
Base-8
1200
Hex
280
Base-24
12g
Base-36
hs
Factorization
Prime factors
2, 5
Divisors
1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640
Sum of divisors other than 640
890
Product of prime factors
640 = 2 x 2 x 2 x 2 x 2 x 2 x 2 x 5
Characteristics
Even Composite
Related primes
Number 640 prime
4751
Prime number before 640
631
Prime number after 640
641