The number 87370
87370 is a composite number with 8 divisors. Its prime factorisation is 2 × 5 × 8737. Divisors (8): 1, 2, 5, 10, 8737, 17474, 43685, 87370.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
87370 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
87370 is composite. Its prime factorisation is
- 3
The divisors add up to 157284; without 87370 itself that is 69914, so 87370 is deficient (69914 is less than 87370). Euler's totient φ(87370) = 34944 numbers up to 87370 share no factor with it.
- 4
The digits of 87370 add up to 25, and repeating that until one digit is left gives the digital root 7. The Collatz sequence (halve if even, else 3n+1) takes 164 steps to reach 1.
LaTeX source of the formulas on this page
\[ 87370 = 2 \times 5 \times 8737 \]
87370 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 157284 |
| Euler totient φ(n) | 34944 |
| Square | 7633516900 |
| Cube | 666940371553000 |
| Square root | 295.584167 |
| Digit sum / digital root | 25 / 7 |
| Collatz steps to 1 | 164 |
| Scientific notation | 8.737 × |
87370 in other forms
| Form | Value |
|---|---|
| In words | eighty-seven thousand three hundred and seventy |
| Binary (base 2) | 10101010101001010 |
| Octal (base 8) | 252512 |
| Hexadecimal (base 16) | 1554A |
| Base 3 | 11102211221 |
| As time | 87370 seconds = 24 h 16 min 10 s |
Is 87370 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (87370 ÷ 2 = 43685) | A number is divisible by 2 if the last digit is even (0, 2, 4, 6, 8). |
| 3 | No (remainder 1) | 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 | Yes (87370 ÷ 5 = 17474) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 4) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 3) | 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 7) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | Yes (87370 ÷ 10 = 8737) | 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 10) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 87370 a prime number?
No. 87370 = 2 × 5 × 8737, so it is divisible by 2.
What are the factors of 87370?
1, 2, 5, 10, 8737, 17474, 43685, 87370.
What is 87370 in binary?
10101010101001010 (hexadecimal 1554A, octal 252512).
What is the square root of 87370?
About 295.5842.
Is 87370 divisible by 3?
No. Its digits add up to 25, which is not a multiple of 3.
What is special about the number 87370?
It is a composite number with 8 divisors.