The number 80428
80428 is a composite number with 6 divisors. Its prime factorisation is × 20107. Divisors (6): 1, 2, 4, 20107, 40214, 80428.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
80428 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
80428 is composite. Its prime factorisation is
- 3
The divisors add up to 140756; without 80428 itself that is 60328, so 80428 is deficient (60328 is less than 80428). Euler's totient φ(80428) = 40212 numbers up to 80428 share no factor with it.
- 4
The digits of 80428 add up to 22, and repeating that until one digit is left gives the digital root 4. The Collatz sequence (halve if even, else 3n+1) takes 120 steps to reach 1.
LaTeX source of the formulas on this page
\[ 80428 = 2^{2} \times 20107 \]80428 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 6 |
| Sum of divisors | 140756 |
| Euler totient φ(n) | 40212 |
| Square | 6468663184 |
| Cube | 520261642562752 |
| Square root | 283.598307 (= 2√20107) |
| Digit sum / digital root | 22 / 4 |
| Collatz steps to 1 | 120 |
| Scientific notation | 8.0428 × |
80428 in other forms
| Form | Value |
|---|---|
| In words | eighty thousand four hundred and twenty-eight |
| Binary (base 2) | 10011101000101100 |
| Octal (base 8) | 235054 |
| Hexadecimal (base 16) | 13A2C |
| Base 3 | 11002022211 |
| As time | 80428 seconds = 22 h 20 min 28 s |
Is 80428 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (80428 ÷ 2 = 40214) | 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 (80428 ÷ 4 = 20107) | 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 4) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 5) | 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 | No (remainder 8) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 7) | 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 80428 a prime number?
No. 80428 = × 20107, so it is divisible by 2.
What are the factors of 80428?
1, 2, 4, 20107, 40214, 80428.
What is 80428 in binary?
10011101000101100 (hexadecimal 13A2C, octal 235054).
What is the square root of 80428?
About 283.5983, exactly 2√20107.
Is 80428 divisible by 3?
No. Its digits add up to 22, which is not a multiple of 3.
What is special about the number 80428?
It is a composite number with 6 divisors.