The number 35842
35842 is a composite number with 4 divisors. Its prime factorisation is 2 × 17921. Divisors (4): 1, 2, 17921, 35842.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 35842: a semiprime: 2 × 17921, the product of two primes.
- 2
35842 is composite. Its prime factorisation is
- 3
The divisors add up to 53766; without 35842 itself that is 17924, so 35842 is deficient (17924 is less than 35842). Euler's totient φ(35842) = 17920 numbers up to 35842 share no factor with it.
- 4
The digits of 35842 add up to 22, and repeating that until one digit is left gives the digital root 4. The Collatz sequence (halve if even, else 3n+1) takes 93 steps to reach 1.
LaTeX source of the formulas on this page
\[ 35842 = 2 \times 17921 \]
35842 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 53766 |
| Euler totient φ(n) | 17920 |
| Square | 1284648964 |
| Cube | 46044388167688 |
| Square root | 189.319835 |
| Digit sum / digital root | 22 / 4 |
| Collatz steps to 1 | 93 |
| Scientific notation | 3.5842 × |
35842 in other forms
| Form | Value |
|---|---|
| In words | thirty-five thousand eight hundred and forty-two |
| Binary (base 2) | 1000110000000010 |
| Octal (base 8) | 106002 |
| Hexadecimal (base 16) | 8C02 |
| Base 3 | 1211011111 |
| As time | 35842 seconds = 9 h 57 min 22 s |
Is 35842 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (35842 ÷ 2 = 17921) | 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 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 | No (remainder 4) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 2) | 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 4) | 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 4) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 10) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 35842 a prime number?
No. 35842 = 2 × 17921, so it is divisible by 2.
What are the factors of 35842?
1, 2, 17921, 35842.
What is 35842 in binary?
1000110000000010 (hexadecimal 8C02, octal 106002).
What is the square root of 35842?
About 189.3198.
Is 35842 divisible by 3?
No. Its digits add up to 22, which is not a multiple of 3.
What is special about the number 35842?
35842 is a semiprime: 2 × 17921, the product of two primes.