The number 42798
42798 is a composite number with 16 divisors. Its prime factorisation is 2 × 3 × 7 × 1019. Divisors (16): 1, 2, 3, 6, 7, 14, 21, 42, 1019, 2038, 3057, 6114, 7133, 14266, 21399, 42798.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
42798 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
42798 is composite. Its prime factorisation is
- 3
The divisors add up to 97920; without 42798 itself that is 55122, so 42798 is abundant (55122 is more than 42798). Euler's totient φ(42798) = 12216 numbers up to 42798 share no factor with it.
- 4
The digits of 42798 add up to 30, and repeating that until one digit is left gives the digital root 3. The Collatz sequence (halve if even, else 3n+1) takes 49 steps to reach 1.
LaTeX source of the formulas on this page
\[ 42798 = 2 \times 3 \times 7 \times 1019 \]
42798 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 16 |
| Sum of divisors | 97920 |
| Euler totient φ(n) | 12216 |
| Square | 1831668804 |
| Cube | 78391761473592 |
| Square root | 206.876775 |
| Digit sum / digital root | 30 / 3 |
| Collatz steps to 1 | 49 |
| Scientific notation | 4.2798 × |
42798 in other forms
| Form | Value |
|---|---|
| In words | forty-two thousand seven hundred and ninety-eight |
| Binary (base 2) | 1010011100101110 |
| Octal (base 8) | 123456 |
| Hexadecimal (base 16) | A72E |
| Base 3 | 2011201010 |
| As time | 42798 seconds = 11 h 53 min 18 s |
Is 42798 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (42798 ÷ 2 = 21399) | A number is divisible by 2 if the last digit is even (0, 2, 4, 6, 8). |
| 3 | Yes (42798 ÷ 3 = 14266) | 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 (42798 ÷ 6 = 7133) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | Yes (42798 ÷ 7 = 6114) | 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 3) | 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 8) | 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 42798 a prime number?
No. 42798 = 2 × 3 × 7 × 1019, so it is divisible by 2.
What are the factors of 42798?
1, 2, 3, 6, 7, 14, 21, 42, 1019, 2038, 3057, 6114, 7133, 14266, 21399, 42798.
What is 42798 in binary?
1010011100101110 (hexadecimal A72E, octal 123456).
What is the square root of 42798?
About 206.8768.
Is 42798 divisible by 3?
Yes. Its digits add up to 30, a multiple of 3.
What is special about the number 42798?
It is a composite number with 16 divisors.