The number 80000
80000 is a composite number with 40 divisors. Its prime factorisation is × . Divisors (40): 1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 125 … 80000.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 80000: a Harshad number: divisible by its digit sum 8.
- 2
80000 is composite. Its prime factorisation is
- 3
The divisors add up to 199155; without 80000 itself that is 119155, so 80000 is abundant (119155 is more than 80000). Euler's totient φ(80000) = 32000 numbers up to 80000 share no factor with it.
- 4
The digits of 80000 add up to 8, and repeating that until one digit is left gives the digital root 8. The Collatz sequence (halve if even, else 3n+1) takes 32 steps to reach 1.
LaTeX source of the formulas on this page
\[ 80000 = 2^{7} \times 5^{4} \]80000 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 40 |
| Sum of divisors | 199155 |
| Euler totient φ(n) | 32000 |
| Square | 6400000000 |
| Cube | 512000000000000 |
| Square root | 282.842712 (= 200√2) |
| Digit sum / digital root | 8 / 8 |
| Collatz steps to 1 | 32 |
| Scientific notation | 8 × |
80000 in other forms
| Form | Value |
|---|---|
| In words | eighty thousand |
| Binary (base 2) | 10011100010000000 |
| Octal (base 8) | 234200 |
| Hexadecimal (base 16) | 13880 |
| Base 3 | 11001201222 |
| As time | 80000 seconds = 22 h 13 min 20 s |
Is 80000 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (80000 ÷ 2 = 40000) | 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 | Yes (80000 ÷ 4 = 20000) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | Yes (80000 ÷ 5 = 16000) | 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 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 | Yes (80000 ÷ 8 = 10000) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 8) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | Yes (80000 ÷ 10 = 8000) | 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 8) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 80000 a prime number?
No. 80000 = × , so it is divisible by 2.
What are the factors of 80000?
1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 125, 128, 160, 200, 250, 320, 400, 500, 625, 640, 800, 1000, 1250, 1600, 2000, 2500, 3200, 4000, 5000, 8000, 10000, 16000, 20000, 40000, 80000.
What is 80000 in binary?
10011100010000000 (hexadecimal 13880, octal 234200).
What is the square root of 80000?
About 282.8427, exactly 200√2.
Is 80000 divisible by 3?
No. Its digits add up to 8, which is not a multiple of 3.
What is special about the number 80000?
80000 is a Harshad number: divisible by its digit sum 8.