The number 80140
80140 is a composite number with 12 divisors. Its prime factorisation is × 5 × 4007. Divisors (12): 1, 2, 4, 5, 10, 20, 4007, 8014, 16028, 20035, 40070, 80140.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
80140 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
80140 is composite. Its prime factorisation is
- 3
The divisors add up to 168336; without 80140 itself that is 88196, so 80140 is abundant (88196 is more than 80140). Euler's totient φ(80140) = 32048 numbers up to 80140 share no factor with it.
- 4
The digits of 80140 add up to 13, and repeating that until one digit is left gives the digital root 4. The Collatz sequence (halve if even, else 3n+1) takes 94 steps to reach 1.
LaTeX source of the formulas on this page
\[ 80140 = 2^{2} \times 5 \times 4007 \]80140 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 12 |
| Sum of divisors | 168336 |
| Euler totient φ(n) | 32048 |
| Square | 6422419600 |
| Cube | 514692706744000 |
| Square root | 283.090092 (= 2√20035) |
| Digit sum / digital root | 13 / 4 |
| Collatz steps to 1 | 94 |
| Scientific notation | 8.014 × |
80140 in other forms
| Form | Value |
|---|---|
| In words | eighty thousand one hundred and forty |
| Binary (base 2) | 10011100100001100 |
| Octal (base 8) | 234414 |
| Hexadecimal (base 16) | 1390C |
| Base 3 | 11001221011 |
| As time | 80140 seconds = 22 h 15 min 40 s |
Is 80140 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (80140 ÷ 2 = 40070) | 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 | Yes (80140 ÷ 4 = 20035) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | Yes (80140 ÷ 5 = 16028) | 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 4) | 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 | Yes (80140 ÷ 10 = 8014) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 5) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 4) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 80140 a prime number?
No. 80140 = × 5 × 4007, so it is divisible by 2.
What are the factors of 80140?
1, 2, 4, 5, 10, 20, 4007, 8014, 16028, 20035, 40070, 80140.
What is 80140 in binary?
10011100100001100 (hexadecimal 1390C, octal 234414).
What is the square root of 80140?
About 283.0901, exactly 2√20035.
Is 80140 divisible by 3?
No. Its digits add up to 13, which is not a multiple of 3.
What is special about the number 80140?
It is a composite number with 12 divisors.