The number 42338
42338 is a composite number with 4 divisors. Its prime factorisation is 2 × 21169. Divisors (4): 1, 2, 21169, 42338.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 42338: a semiprime: 2 × 21169, the product of two primes.
- 2
42338 is composite. Its prime factorisation is
- 3
The divisors add up to 63510; without 42338 itself that is 21172, so 42338 is deficient (21172 is less than 42338). Euler's totient φ(42338) = 21168 numbers up to 42338 share no factor with it.
- 4
The digits of 42338 add up to 20, and repeating that until one digit is left gives the digital root 2. The Collatz sequence (halve if even, else 3n+1) takes 150 steps to reach 1.
LaTeX source of the formulas on this page
\[ 42338 = 2 \times 21169 \]
42338 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 63510 |
| Euler totient φ(n) | 21168 |
| Square | 1792506244 |
| Cube | 75891129358472 |
| Square root | 205.761998 |
| Digit sum / digital root | 20 / 2 |
| Collatz steps to 1 | 150 |
| Scientific notation | 4.2338 × |
42338 in other forms
| Form | Value |
|---|---|
| In words | forty-two thousand three hundred and thirty-eight |
| Binary (base 2) | 1010010101100010 |
| Octal (base 8) | 122542 |
| Hexadecimal (base 16) | A562 |
| Base 3 | 2011002002 |
| As time | 42338 seconds = 11 h 45 min 38 s |
Is 42338 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (42338 ÷ 2 = 21169) | A number is divisible by 2 if the last digit is even (0, 2, 4, 6, 8). |
| 3 | No (remainder 2) | 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 | No (remainder 2) | 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 2) | 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 10) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 2) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 42338 a prime number?
No. 42338 = 2 × 21169, so it is divisible by 2.
What are the factors of 42338?
1, 2, 21169, 42338.
What is 42338 in binary?
1010010101100010 (hexadecimal A562, octal 122542).
What is the square root of 42338?
About 205.7620.
Is 42338 divisible by 3?
No. Its digits add up to 20, which is not a multiple of 3.
What is special about the number 42338?
42338 is a semiprime: 2 × 21169, the product of two primes.