MathQuarryCalculators

Numbers / 840

The Number 840

840 is composite: factorization 2^3 × 3 × 5 × 7. That gives 840 exactly 32 divisors: 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 420, 840. 840's proper divisors total 2040, 1200 more than 840 itself, so 840 is abundant. 840 has a digit sum of 12; for 840, the digital root works out to 3. 840: 2, 3, 4, 5, 6, 7, 8, 10, 12 all divide 840 evenly, out of 2-12. 840 is 1101001000 in binary and 348 in hex; as a Roman numeral it's DCCCXL.

Factors
1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 420, 840
Number of factors
32
Prime?
No
Prime factorization
2^3 x 3 x 5 x 7
Even or odd
Even
Square
705600
Cube
592704000
Binary
1101001000
Hexadecimal
348
Roman numeral
DCCCXL
Perfect square?
No
Perfect cube?
No
Perfect number?
No
Triangular number?
No
Fibonacci number?
No