The number 87018
87018 is a composite number with 8 divisors. Its prime factorisation is 2 × 3 × 14503. Divisors (8): 1, 2, 3, 6, 14503, 29006, 43509, 87018.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
87018 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
87018 is composite. Its prime factorisation is
- 3
The divisors add up to 174048; without 87018 itself that is 87030, so 87018 is abundant (87030 is more than 87018). Euler's totient φ(87018) = 29004 numbers up to 87018 share no factor with it.
- 4
The digits of 87018 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 71 steps to reach 1.
LaTeX source of the formulas on this page
\[ 87018 = 2 \times 3 \times 14503 \]
87018 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 174048 |
| Euler totient φ(n) | 29004 |
| Square | 7572132324 |
| Cube | 658911810569832 |
| Square root | 294.988135 |
| Digit sum / digital root | 24 / 6 |
| Collatz steps to 1 | 71 |
| Scientific notation | 8.7018 × |
87018 in other forms
| Form | Value |
|---|---|
| In words | eighty-seven thousand and eighteen |
| Binary (base 2) | 10101001111101010 |
| Octal (base 8) | 251752 |
| Hexadecimal (base 16) | 153EA |
| Base 3 | 11102100220 |
| As time | 87018 seconds = 24 h 10 min 18 s |
Is 87018 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (87018 ÷ 2 = 43509) | A number is divisible by 2 if the last digit is even (0, 2, 4, 6, 8). |
| 3 | Yes (87018 ÷ 3 = 29006) | 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 (87018 ÷ 6 = 14503) | 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 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 8) | 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 87018 a prime number?
No. 87018 = 2 × 3 × 14503, so it is divisible by 2.
What are the factors of 87018?
1, 2, 3, 6, 14503, 29006, 43509, 87018.
What is 87018 in binary?
10101001111101010 (hexadecimal 153EA, octal 251752).
What is the square root of 87018?
About 294.9881.
Is 87018 divisible by 3?
Yes. Its digits add up to 24, a multiple of 3.
What is special about the number 87018?
It is a composite number with 8 divisors.