644
Number 644 properties
- 644 is an even number.
- 644 is a Harshad number, which means it is divisible by the sum of its digits (644 = 14, and 644 is divisible by 14).
Number 644 - properties and curiosities
644 (number)
Prime factorization
Prime factorization of 644: 2^2 × 7 × 23.
Divisors
Divisor count: 12
1, 2, 4, 7, 14, 23, 28, 46, 92, 161, 322, 644
Factors of 644 are: 1, 2, 4, 7, 14, 23, 28, 46, 92, 161, 322, 644.
Representations
In octal, 644 is represented as 1204.
In binary, 644 is represented as 1010000100.
In hex, 644 is represented as 284.
Roman numeral: DCXLIV
Curiosities
- 644 is divisible by the sum of its digits.
Related numbers
Quick answers
Is 644 prime?
No, 644 is not prime.
What are the factors of 644?
1, 2, 4, 7, 14, 23, 28, 46, 92, 161, 322, 644
What is 644 in binary?
1010000100