The number 80138
80138 is a composite number with 8 divisors. Its prime factorisation is 2 × 17 × 2357. Divisors (8): 1, 2, 17, 34, 2357, 4714, 40069, 80138.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
80138 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
80138 is composite. Its prime factorisation is
- 3
The divisors add up to 127332; without 80138 itself that is 47194, so 80138 is deficient (47194 is less than 80138). Euler's totient φ(80138) = 37696 numbers up to 80138 share no factor with it.
- 4
The digits of 80138 add up to 20, and repeating that until one digit is left gives the digital root 2. The Collatz sequence (halve if even, else 3n+1) takes 94 steps to reach 1.
LaTeX source of the formulas on this page
\[ 80138 = 2 \times 17 \times 2357 \]
80138 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 127332 |
| Euler totient φ(n) | 37696 |
| Square | 6422099044 |
| Cube | 514654173188072 |
| Square root | 283.086559 |
| Digit sum / digital root | 20 / 2 |
| Collatz steps to 1 | 94 |
| Scientific notation | 8.0138 × |
80138 in other forms
| Form | Value |
|---|---|
| In words | eighty thousand one hundred and thirty-eight |
| Binary (base 2) | 10011100100001010 |
| Octal (base 8) | 234412 |
| Hexadecimal (base 16) | 1390A |
| Base 3 | 11001221002 |
| As time | 80138 seconds = 22 h 15 min 38 s |
Is 80138 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (80138 ÷ 2 = 40069) | 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 | No (remainder 3) | 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 2) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 8) | 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 2) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 80138 a prime number?
No. 80138 = 2 × 17 × 2357, so it is divisible by 2.
What are the factors of 80138?
1, 2, 17, 34, 2357, 4714, 40069, 80138.
What is 80138 in binary?
10011100100001010 (hexadecimal 1390A, octal 234412).
What is the square root of 80138?
About 283.0866.
Is 80138 divisible by 3?
No. Its digits add up to 20, which is not a multiple of 3.
What is special about the number 80138?
It is a composite number with 8 divisors.