The number 87322
87322 is a composite number with 4 divisors. Its prime factorisation is 2 × 43661. Divisors (4): 1, 2, 43661, 87322.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 87322: a happy number: repeatedly adding the squares of its digits reaches 1; a semiprime: 2 × 43661, the product of two primes.
- 2
87322 is composite. Its prime factorisation is
- 3
The divisors add up to 130986; without 87322 itself that is 43664, so 87322 is deficient (43664 is less than 87322). Euler's totient φ(87322) = 43660 numbers up to 87322 share no factor with it.
- 4
The digits of 87322 add up to 22, and repeating that until one digit is left gives the digital root 4. The Collatz sequence (halve if even, else 3n+1) takes 71 steps to reach 1.
LaTeX source of the formulas on this page
\[ 87322 = 2 \times 43661 \]
87322 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 130986 |
| Euler totient φ(n) | 43660 |
| Square | 7625131684 |
| Cube | 665841748910248 |
| Square root | 295.502961 |
| Digit sum / digital root | 22 / 4 |
| Collatz steps to 1 | 71 |
| Scientific notation | 8.7322 × |
87322 in other forms
| Form | Value |
|---|---|
| In words | eighty-seven thousand three hundred and twenty-two |
| Binary (base 2) | 10101010100011010 |
| Octal (base 8) | 252432 |
| Hexadecimal (base 16) | 1551A |
| Base 3 | 11102210011 |
| As time | 87322 seconds = 24 h 15 min 22 s |
Is 87322 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (87322 ÷ 2 = 43661) | 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 | No (remainder 2) | 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 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 2) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 4) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 2) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 4) | 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 87322 a prime number?
No. 87322 = 2 × 43661, so it is divisible by 2.
What are the factors of 87322?
1, 2, 43661, 87322.
What is 87322 in binary?
10101010100011010 (hexadecimal 1551A, octal 252432).
What is the square root of 87322?
About 295.5030.
Is 87322 divisible by 3?
No. Its digits add up to 22, which is not a multiple of 3.
What is special about the number 87322?
87322 is a happy number: repeatedly adding the squares of its digits reaches 1; a semiprime: 2 × 43661, the product of two primes.