The number 39018
39018 is a composite number with 16 divisors. Its prime factorisation is 2 × 3 × 7 × 929. Divisors (16): 1, 2, 3, 6, 7, 14, 21, 42, 929, 1858, 2787, 5574, 6503, 13006, 19509, 39018.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 39018: a Harshad number: divisible by its digit sum 21.
- 2
39018 is composite. Its prime factorisation is
- 3
The divisors add up to 89280; without 39018 itself that is 50262, so 39018 is abundant (50262 is more than 39018). Euler's totient φ(39018) = 11136 numbers up to 39018 share no factor with it.
- 4
The digits of 39018 add up to 21, and repeating that until one digit is left gives the digital root 3. The Collatz sequence (halve if even, else 3n+1) takes 137 steps to reach 1.
LaTeX source of the formulas on this page
\[ 39018 = 2 \times 3 \times 7 \times 929 \]
39018 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 16 |
| Sum of divisors | 89280 |
| Euler totient φ(n) | 11136 |
| Square | 1522404324 |
| Cube | 59401171913832 |
| Square root | 197.529745 |
| Digit sum / digital root | 21 / 3 |
| Collatz steps to 1 | 137 |
| Scientific notation | 3.9018 × |
39018 in other forms
| Form | Value |
|---|---|
| In words | thirty-nine thousand and eighteen |
| Binary (base 2) | 1001100001101010 |
| Octal (base 8) | 114152 |
| Hexadecimal (base 16) | 986A |
| Base 3 | 1222112010 |
| As time | 39018 seconds = 10 h 50 min 18 s |
Is 39018 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (39018 ÷ 2 = 19509) | A number is divisible by 2 if the last digit is even (0, 2, 4, 6, 8). |
| 3 | Yes (39018 ÷ 3 = 13006) | 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 (39018 ÷ 6 = 6503) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | Yes (39018 ÷ 7 = 5574) | 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 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 1) | 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 39018 a prime number?
No. 39018 = 2 × 3 × 7 × 929, so it is divisible by 2.
What are the factors of 39018?
1, 2, 3, 6, 7, 14, 21, 42, 929, 1858, 2787, 5574, 6503, 13006, 19509, 39018.
What is 39018 in binary?
1001100001101010 (hexadecimal 986A, octal 114152).
What is the square root of 39018?
About 197.5297.
Is 39018 divisible by 3?
Yes. Its digits add up to 21, a multiple of 3.
What is special about the number 39018?
39018 is a Harshad number: divisible by its digit sum 21.