MathQuarryCalculators

Numbers / 644

The Number 644

644 is composite: factorization 2^2 × 7 × 23. That gives 644 exactly 12 divisors: 1, 2, 4, 7, 14, 23, 28, 46, 92, 161, 322, 644. 644's proper divisors total 700, 56 more than 644 itself, so 644 is abundant. 644 has a digit sum of 14; for 644, the digital root works out to 5. 644: 2, 4, 7 all divide 644 evenly, out of 2-12. 644 is 1010000100 in binary and 284 in hex; as a Roman numeral it's DCXLIV.

Factors
1, 2, 4, 7, 14, 23, 28, 46, 92, 161, 322, 644
Number of factors
12
Prime?
No
Prime factorization
2^2 x 7 x 23
Even or odd
Even
Square
414736
Cube
267089984
Binary
1010000100
Hexadecimal
284
Roman numeral
DCXLIV
Perfect square?
No
Perfect cube?
No
Perfect number?
No
Triangular number?
No
Fibonacci number?
No