The number 42938
42938 is a composite number with 8 divisors. Its prime factorisation is 2 × 7 × 3067. Divisors (8): 1, 2, 7, 14, 3067, 6134, 21469, 42938.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
42938 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
42938 is composite. Its prime factorisation is
- 3
The divisors add up to 73632; without 42938 itself that is 30694, so 42938 is deficient (30694 is less than 42938). Euler's totient φ(42938) = 18396 numbers up to 42938 share no factor with it.
- 4
The digits of 42938 add up to 26, and repeating that until one digit is left gives the digital root 8. The Collatz sequence (halve if even, else 3n+1) takes 75 steps to reach 1.
LaTeX source of the formulas on this page
\[ 42938 = 2 \times 7 \times 3067 \]
42938 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 73632 |
| Euler totient φ(n) | 18396 |
| Square | 1843671844 |
| Cube | 79163581637672 |
| Square root | 207.214864 |
| Digit sum / digital root | 26 / 8 |
| Collatz steps to 1 | 75 |
| Scientific notation | 4.2938 × |
42938 in other forms
| Form | Value |
|---|---|
| In words | forty-two thousand nine hundred and thirty-eight |
| Binary (base 2) | 1010011110111010 |
| Octal (base 8) | 123672 |
| Hexadecimal (base 16) | A7BA |
| Base 3 | 2011220022 |
| As time | 42938 seconds = 11 h 55 min 38 s |
Is 42938 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (42938 ÷ 2 = 21469) | A number is divisible by 2 if the last digit is even (0, 2, 4, 6, 8). |
| 3 | No (remainder 2) | 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 | No (remainder 2) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | Yes (42938 ÷ 7 = 6134) | 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 2) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 8) | 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 5) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 2) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 42938 a prime number?
No. 42938 = 2 × 7 × 3067, so it is divisible by 2.
What are the factors of 42938?
1, 2, 7, 14, 3067, 6134, 21469, 42938.
What is 42938 in binary?
1010011110111010 (hexadecimal A7BA, octal 123672).
What is the square root of 42938?
About 207.2149.
Is 42938 divisible by 3?
No. Its digits add up to 26, which is not a multiple of 3.
What is special about the number 42938?
It is a composite number with 8 divisors.