The number 82490
82490 is a composite number with 16 divisors. Its prime factorisation is 2 × 5 × 73 × 113. Divisors (16): 1, 2, 5, 10, 73, 113, 146, 226, 365, 565, 730, 1130, 8249, 16498, 41245, 82490.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
82490 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
82490 is composite. Its prime factorisation is
- 3
The divisors add up to 151848; without 82490 itself that is 69358, so 82490 is deficient (69358 is less than 82490). Euler's totient φ(82490) = 32256 numbers up to 82490 share no factor with it.
- 4
The digits of 82490 add up to 23, and repeating that until one digit is left gives the digital root 5. The Collatz sequence (halve if even, else 3n+1) takes 89 steps to reach 1.
LaTeX source of the formulas on this page
\[ 82490 = 2 \times 5 \times 73 \times 113 \]
82490 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 16 |
| Sum of divisors | 151848 |
| Euler totient φ(n) | 32256 |
| Square | 6804600100 |
| Cube | 561311462249000 |
| Square root | 287.210724 |
| Digit sum / digital root | 23 / 5 |
| Collatz steps to 1 | 89 |
| Scientific notation | 8.249 × |
82490 in other forms
| Form | Value |
|---|---|
| In words | eighty-two thousand four hundred and ninety |
| Binary (base 2) | 10100001000111010 |
| Octal (base 8) | 241072 |
| Hexadecimal (base 16) | 1423A |
| Base 3 | 11012011012 |
| As time | 82490 seconds = 22 h 54 min 50 s |
Is 82490 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (82490 ÷ 2 = 41245) | A number is divisible by 2 if the last digit is even (0, 2, 4, 6, 8). |
| 3 | No (remainder 2) | 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 (82490 ÷ 5 = 16498) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 2) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 2) | 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 5) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | Yes (82490 ÷ 10 = 8249) | 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 2) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 82490 a prime number?
No. 82490 = 2 × 5 × 73 × 113, so it is divisible by 2.
What are the factors of 82490?
1, 2, 5, 10, 73, 113, 146, 226, 365, 565, 730, 1130, 8249, 16498, 41245, 82490.
What is 82490 in binary?
10100001000111010 (hexadecimal 1423A, octal 241072).
What is the square root of 82490?
About 287.2107.
Is 82490 divisible by 3?
No. Its digits add up to 23, which is not a multiple of 3.
What is special about the number 82490?
It is a composite number with 16 divisors.