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Numbers / 138

The Number 138

138 is composite: factorization 2 × 3 × 23. That gives 138 exactly 8 divisors: 1, 2, 3, 6, 23, 46, 69, 138. 138's proper divisors total 150, 12 more than 138 itself, so 138 is abundant. 138 has a digit sum of 12; for 138, the digital root works out to 3. 138: 2, 3, 6 all divide 138 evenly, out of 2-12. 138 is 10001010 in binary and 8A in hex; as a Roman numeral it's CXXXVIII.

Factors
1, 2, 3, 6, 23, 46, 69, 138
Number of factors
8
Prime?
No
Prime factorization
2 x 3 x 23
Even or odd
Even
Square
19044
Cube
2628072
Binary
10001010
Hexadecimal
8A
Roman numeral
CXXXVIII
Perfect square?
No
Perfect cube?
No
Perfect number?
No
Triangular number?
No
Fibonacci number?
No
Factors of 138 in detail →Is 138 prime? →