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Numbers / 84

The Number 84

84 is composite: factorization 2^2 × 3 × 7. That gives 84 exactly 12 divisors: 1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 84. 84's proper divisors total 140, 56 more than 84 itself, so 84 is abundant. 84 has a digit sum of 12; for 84, the digital root works out to 3. 84: 2, 3, 4, 6, 7, 12 all divide 84 evenly, out of 2-12. 84 is 1010100 in binary and 54 in hex; as a Roman numeral it's LXXXIV.

Factors
1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 84
Number of factors
12
Prime?
No
Prime factorization
2^2 x 3 x 7
Even or odd
Even
Square
7056
Cube
592704
Binary
1010100
Hexadecimal
54
Roman numeral
LXXXIV
Perfect square?
No
Perfect cube?
No
Perfect number?
No
Triangular number?
No
Fibonacci number?
No
Factors of 84 in detail →Is 84 prime? →