The number 42858
42858 is a composite number with 12 divisors. Its prime factorisation is 2 × × 2381. Divisors (12): 1, 2, 3, 6, 9, 18, 2381, 4762, 7143, 14286, 21429, 42858.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
42858 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
42858 is composite. Its prime factorisation is
- 3
The divisors add up to 92898; without 42858 itself that is 50040, so 42858 is abundant (50040 is more than 42858). Euler's totient φ(42858) = 14280 numbers up to 42858 share no factor with it.
- 4
The digits of 42858 add up to 27, and repeating that until one digit is left gives the digital root 9. The Collatz sequence (halve if even, else 3n+1) takes 31 steps to reach 1.
LaTeX source of the formulas on this page
\[ 42858 = 2 \times 3^{2} \times 2381 \]42858 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 12 |
| Sum of divisors | 92898 |
| Euler totient φ(n) | 14280 |
| Square | 1836808164 |
| Cube | 78721924292712 |
| Square root | 207.021738 (= 3√4762) |
| Digit sum / digital root | 27 / 9 |
| Collatz steps to 1 | 31 |
| Scientific notation | 4.2858 × |
42858 in other forms
| Form | Value |
|---|---|
| In words | forty-two thousand eight hundred and fifty-eight |
| Binary (base 2) | 1010011101101010 |
| Octal (base 8) | 123552 |
| Hexadecimal (base 16) | A76A |
| Base 3 | 2011210100 |
| As time | 42858 seconds = 11 h 54 min 18 s |
Is 42858 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (42858 ÷ 2 = 21429) | A number is divisible by 2 if the last digit is even (0, 2, 4, 6, 8). |
| 3 | Yes (42858 ÷ 3 = 14286) | 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 (42858 ÷ 6 = 7143) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 4) | 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 | Yes (42858 ÷ 9 = 4762) | 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 2) | 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 42858 a prime number?
No. 42858 = 2 × × 2381, so it is divisible by 2.
What are the factors of 42858?
1, 2, 3, 6, 9, 18, 2381, 4762, 7143, 14286, 21429, 42858.
What is 42858 in binary?
1010011101101010 (hexadecimal A76A, octal 123552).
What is the square root of 42858?
About 207.0217, exactly 3√4762.
Is 42858 divisible by 3?
Yes. Its digits add up to 27, a multiple of 3.
What is special about the number 42858?
It is a composite number with 12 divisors.