640
Number 640 properties
- 640 is an even number.
- 640 is a Harshad number, which means it is divisible by the sum of its digits (640 = 10, and 640 is divisible by 10).
Number 640 - properties and curiosities
640 (number)
Prime factorization
Prime factorization of 640: 2^7 × 5.
Divisors
Divisor count: 16
1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640
Factors of 640 are: 1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640.
Representations
In octal, 640 is represented as 1200.
In binary, 640 is represented as 1010000000.
In hex, 640 is represented as 280.
Roman numeral: DCXL
Curiosities
- 640 is divisible by the sum of its digits.
Related numbers
Quick answers
Is 640 prime?
No, 640 is not prime.
What are the factors of 640?
1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640
What is 640 in binary?
1010000000