The number 47442
47442 is a composite number with 8 divisors. Its prime factorisation is 2 × 3 × 7907. Divisors (8): 1, 2, 3, 6, 7907, 15814, 23721, 47442.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
47442 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
47442 is composite. Its prime factorisation is
- 3
The divisors add up to 94896; without 47442 itself that is 47454, so 47442 is abundant (47454 is more than 47442). Euler's totient φ(47442) = 15812 numbers up to 47442 share no factor with it.
- 4
The digits of 47442 add up to 21, and repeating that until one digit is left gives the digital root 3. The Collatz sequence (halve if even, else 3n+1) takes 75 steps to reach 1.
LaTeX source of the formulas on this page
\[ 47442 = 2 \times 3 \times 7907 \]
47442 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 94896 |
| Euler totient φ(n) | 15812 |
| Square | 2250743364 |
| Cube | 106779766674888 |
| Square root | 217.811845 |
| Digit sum / digital root | 21 / 3 |
| Collatz steps to 1 | 75 |
| Scientific notation | 4.7442 × |
47442 in other forms
| Form | Value |
|---|---|
| In words | forty-seven thousand four hundred and forty-two |
| Binary (base 2) | 1011100101010010 |
| Octal (base 8) | 134522 |
| Hexadecimal (base 16) | B952 |
| Base 3 | 2102002010 |
| As time | 47442 seconds = 13 h 10 min 42 s |
Is 47442 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (47442 ÷ 2 = 23721) | A number is divisible by 2 if the last digit is even (0, 2, 4, 6, 8). |
| 3 | Yes (47442 ÷ 3 = 15814) | 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 2) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | Yes (47442 ÷ 6 = 7907) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 3) | 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 3) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 2) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 10) | 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 47442 a prime number?
No. 47442 = 2 × 3 × 7907, so it is divisible by 2.
What are the factors of 47442?
1, 2, 3, 6, 7907, 15814, 23721, 47442.
What is 47442 in binary?
1011100101010010 (hexadecimal B952, octal 134522).
What is the square root of 47442?
About 217.8118.
Is 47442 divisible by 3?
Yes. Its digits add up to 21, a multiple of 3.
What is special about the number 47442?
It is a composite number with 8 divisors.