The number 18078
18078 is a composite number with 16 divisors. Its prime factorisation is 2 × 3 × 23 × 131. Divisors (16): 1, 2, 3, 6, 23, 46, 69, 131, 138, 262, 393, 786, 3013, 6026, 9039, 18078.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
18078 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
18078 is composite. Its prime factorisation is
- 3
The divisors add up to 38016; without 18078 itself that is 19938, so 18078 is abundant (19938 is more than 18078). Euler's totient φ(18078) = 5720 numbers up to 18078 share no factor with it.
- 4
The digits of 18078 add up to 24, and repeating that until one digit is left gives the digital root 6. The Collatz sequence (halve if even, else 3n+1) takes 92 steps to reach 1.
LaTeX source of the formulas on this page
\[ 18078 = 2 \times 3 \times 23 \times 131 \]
18078 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 16 |
| Sum of divisors | 38016 |
| Euler totient φ(n) | 5720 |
| Square | 326814084 |
| Cube | 5908145010552 |
| Square root | 134.454453 |
| Digit sum / digital root | 24 / 6 |
| Collatz steps to 1 | 92 |
| Scientific notation | 1.8078 × |
18078 in other forms
| Form | Value |
|---|---|
| In words | eighteen thousand and seventy-eight |
| Binary (base 2) | 100011010011110 |
| Octal (base 8) | 43236 |
| Hexadecimal (base 16) | 469E |
| Base 3 | 220210120 |
| As time | 18078 seconds = 5 h 1 min 18 s |
Is 18078 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (18078 ÷ 2 = 9039) | A number is divisible by 2 if the last digit is even (0, 2, 4, 6, 8). |
| 3 | Yes (18078 ÷ 3 = 6026) | 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 (18078 ÷ 6 = 3013) | 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 6) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 6) | 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 5) | 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 18078 a prime number?
No. 18078 = 2 × 3 × 23 × 131, so it is divisible by 2.
What are the factors of 18078?
1, 2, 3, 6, 23, 46, 69, 131, 138, 262, 393, 786, 3013, 6026, 9039, 18078.
What is 18078 in binary?
100011010011110 (hexadecimal 469E, octal 43236).
What is the square root of 18078?
About 134.4545.
Is 18078 divisible by 3?
Yes. Its digits add up to 24, a multiple of 3.
What is special about the number 18078?
It is a composite number with 16 divisors.