The number 80490
80490 is a composite number with 16 divisors. Its prime factorisation is 2 × 3 × 5 × 2683. Divisors (16): 1, 2, 3, 5, 6, 10, 15, 30, 2683, 5366, 8049, 13415, 16098, 26830, 40245, 80490.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
80490 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
80490 is composite. Its prime factorisation is
- 3
The divisors add up to 193248; without 80490 itself that is 112758, so 80490 is abundant (112758 is more than 80490). Euler's totient φ(80490) = 21456 numbers up to 80490 share no factor with it.
- 4
The digits of 80490 add up to 21, and repeating that until one digit is left gives the digital root 3. The Collatz sequence (halve if even, else 3n+1) takes 45 steps to reach 1.
LaTeX source of the formulas on this page
\[ 80490 = 2 \times 3 \times 5 \times 2683 \]
80490 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 16 |
| Sum of divisors | 193248 |
| Euler totient φ(n) | 21456 |
| Square | 6478640100 |
| Cube | 521465741649000 |
| Square root | 283.707596 |
| Digit sum / digital root | 21 / 3 |
| Collatz steps to 1 | 45 |
| Scientific notation | 8.049 × |
80490 in other forms
| Form | Value |
|---|---|
| In words | eighty thousand four hundred and ninety |
| Binary (base 2) | 10011101001101010 |
| Octal (base 8) | 235152 |
| Hexadecimal (base 16) | 13A6A |
| Base 3 | 11002102010 |
| As time | 80490 seconds = 22 h 21 min 30 s |
Is 80490 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (80490 ÷ 2 = 40245) | A number is divisible by 2 if the last digit is even (0, 2, 4, 6, 8). |
| 3 | Yes (80490 ÷ 3 = 26830) | 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 (80490 ÷ 5 = 16098) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | Yes (80490 ÷ 6 = 13415) | 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 3) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | Yes (80490 ÷ 10 = 8049) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 3) | 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 80490 a prime number?
No. 80490 = 2 × 3 × 5 × 2683, so it is divisible by 2.
What are the factors of 80490?
1, 2, 3, 5, 6, 10, 15, 30, 2683, 5366, 8049, 13415, 16098, 26830, 40245, 80490.
What is 80490 in binary?
10011101001101010 (hexadecimal 13A6A, octal 235152).
What is the square root of 80490?
About 283.7076.
Is 80490 divisible by 3?
Yes. Its digits add up to 21, a multiple of 3.
What is special about the number 80490?
It is a composite number with 16 divisors.