The number 42889
42889 is a composite number with 8 divisors. Its prime factorisation is 7 × 11 × 557. Divisors (8): 1, 7, 11, 77, 557, 3899, 6127, 42889.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
42889 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
42889 is composite. Its prime factorisation is
- 3
The divisors add up to 53568; without 42889 itself that is 10679, so 42889 is deficient (10679 is less than 42889). Euler's totient φ(42889) = 33360 numbers up to 42889 share no factor with it.
- 4
The digits of 42889 add up to 31, and repeating that until one digit is left gives the digital root 4. The Collatz sequence (halve if even, else 3n+1) takes 49 steps to reach 1.
LaTeX source of the formulas on this page
\[ 42889 = 7 \times 11 \times 557 \]
42889 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 53568 |
| Euler totient φ(n) | 33360 |
| Square | 1839466321 |
| Cube | 78892871041369 |
| Square root | 207.096596 |
| Digit sum / digital root | 31 / 4 |
| Collatz steps to 1 | 49 |
| Scientific notation | 4.2889 × |
42889 in other forms
| Form | Value |
|---|---|
| In words | forty-two thousand eight hundred and eighty-nine |
| Binary (base 2) | 1010011110001001 |
| Octal (base 8) | 123611 |
| Hexadecimal (base 16) | A789 |
| Base 3 | 2011211111 |
| As time | 42889 seconds = 11 h 54 min 49 s |
Is 42889 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | No (remainder 1) | A number is divisible by 2 if the last digit is even (0, 2, 4, 6, 8). |
| 3 | No (remainder 1) | A number is divisible by 3 if the digits add up to a multiple of 3. |
| 4 | No (remainder 1) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | No (remainder 4) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 1) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | Yes (42889 ÷ 7 = 6127) | 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 1) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 4) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 9) | A number is divisible by 10 if the last digit is 0. |
| 11 | Yes (42889 ÷ 11 = 3899) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 1) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 42889 a prime number?
No. 42889 = 7 × 11 × 557, so it is divisible by 7.
What are the factors of 42889?
1, 7, 11, 77, 557, 3899, 6127, 42889.
What is 42889 in binary?
1010011110001001 (hexadecimal A789, octal 123611).
What is the square root of 42889?
About 207.0966.
Is 42889 divisible by 3?
No. Its digits add up to 31, which is not a multiple of 3.
What is special about the number 42889?
It is a composite number with 8 divisors.