The number 42918
42918 is a composite number with 16 divisors. Its prime factorisation is 2 × 3 × 23 × 311. Divisors (16): 1, 2, 3, 6, 23, 46, 69, 138, 311, 622, 933, 1866, 7153, 14306, 21459, 42918.
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How to work it out
- 1
42918 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
42918 is composite. Its prime factorisation is
- 3
The divisors add up to 89856; without 42918 itself that is 46938, so 42918 is abundant (46938 is more than 42918). Euler's totient φ(42918) = 13640 numbers up to 42918 share no factor with it.
- 4
The digits of 42918 add up to 24, and repeating that until one digit is left gives the digital root 6. The Collatz sequence (halve if even, else 3n+1) takes 49 steps to reach 1.
LaTeX source of the formulas on this page
\[ 42918 = 2 \times 3 \times 23 \times 311 \]
42918 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 16 |
| Sum of divisors | 89856 |
| Euler totient φ(n) | 13640 |
| Square | 1841954724 |
| Cube | 79053012844632 |
| Square root | 207.166600 |
| Digit sum / digital root | 24 / 6 |
| Collatz steps to 1 | 49 |
| Scientific notation | 4.2918 × |
42918 in other forms
| Form | Value |
|---|---|
| In words | forty-two thousand nine hundred and eighteen |
| Binary (base 2) | 1010011110100110 |
| Octal (base 8) | 123646 |
| Hexadecimal (base 16) | A7A6 |
| Base 3 | 2011212120 |
| As time | 42918 seconds = 11 h 55 min 18 s |
Is 42918 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (42918 ÷ 2 = 21459) | A number is divisible by 2 if the last digit is even (0, 2, 4, 6, 8). |
| 3 | Yes (42918 ÷ 3 = 14306) | A number is divisible by 3 if the digits add up to a multiple of 3. |
| 4 | No (remainder 2) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | No (remainder 3) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | Yes (42918 ÷ 6 = 7153) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 1) | A number is divisible by 7 if double the last digit and subtract it from the rest: the result is a multiple of 7. |
| 8 | No (remainder 6) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 6) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 8) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 7) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 6) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 42918 a prime number?
No. 42918 = 2 × 3 × 23 × 311, so it is divisible by 2.
What are the factors of 42918?
1, 2, 3, 6, 23, 46, 69, 138, 311, 622, 933, 1866, 7153, 14306, 21459, 42918.
What is 42918 in binary?
1010011110100110 (hexadecimal A7A6, octal 123646).
What is the square root of 42918?
About 207.1666.
Is 42918 divisible by 3?
Yes. Its digits add up to 24, a multiple of 3.
What is special about the number 42918?
It is a composite number with 16 divisors.