The number 38018
38018 is a composite number with 4 divisors. Its prime factorisation is 2 × 19009. Divisors (4): 1, 2, 19009, 38018.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 38018: a semiprime: 2 × 19009, the product of two primes.
- 2
38018 is composite. Its prime factorisation is
- 3
The divisors add up to 57030; without 38018 itself that is 19012, so 38018 is deficient (19012 is less than 38018). Euler's totient φ(38018) = 19008 numbers up to 38018 share no factor with it.
- 4
The digits of 38018 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 124 steps to reach 1.
LaTeX source of the formulas on this page
\[ 38018 = 2 \times 19009 \]
38018 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 57030 |
| Euler totient φ(n) | 19008 |
| Square | 1445368324 |
| Cube | 54950012941832 |
| Square root | 194.982050 |
| Digit sum / digital root | 20 / 2 |
| Collatz steps to 1 | 124 |
| Scientific notation | 3.8018 × |
38018 in other forms
| Form | Value |
|---|---|
| In words | thirty-eight thousand and eighteen |
| Binary (base 2) | 1001010010000010 |
| Octal (base 8) | 112202 |
| Hexadecimal (base 16) | 9482 |
| Base 3 | 1221011002 |
| As time | 38018 seconds = 10 h 33 min 38 s |
Is 38018 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (38018 ÷ 2 = 19009) | 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 1) | 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 2) | 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 38018 a prime number?
No. 38018 = 2 × 19009, so it is divisible by 2.
What are the factors of 38018?
1, 2, 19009, 38018.
What is 38018 in binary?
1001010010000010 (hexadecimal 9482, octal 112202).
What is the square root of 38018?
About 194.9821.
Is 38018 divisible by 3?
No. Its digits add up to 20, which is not a multiple of 3.
What is special about the number 38018?
38018 is a semiprime: 2 × 19009, the product of two primes.