The number 38789
38789 is a composite number with 4 divisors. Its prime factorisation is 79 × 491. Divisors (4): 1, 79, 491, 38789.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 38789: a semiprime: 79 × 491, the product of two primes.
- 2
38789 is composite. Its prime factorisation is
- 3
The divisors add up to 39360; without 38789 itself that is 571, so 38789 is deficient (571 is less than 38789). Euler's totient φ(38789) = 38220 numbers up to 38789 share no factor with it.
- 4
The digits of 38789 add up to 35, and repeating that until one digit is left gives the digital root 8. The Collatz sequence (halve if even, else 3n+1) takes 137 steps to reach 1.
LaTeX source of the formulas on this page
\[ 38789 = 79 \times 491 \]
38789 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 39360 |
| Euler totient φ(n) | 38220 |
| Square | 1504586521 |
| Cube | 58361406563069 |
| Square root | 196.949232 |
| Digit sum / digital root | 35 / 8 |
| Collatz steps to 1 | 137 |
| Scientific notation | 3.8789 × |
38789 in other forms
| Form | Value |
|---|---|
| In words | thirty-eight thousand seven hundred and eighty-nine |
| Binary (base 2) | 1001011110000101 |
| Octal (base 8) | 113605 |
| Hexadecimal (base 16) | 9785 |
| Base 3 | 1222012122 |
| As time | 38789 seconds = 10 h 46 min 29 s |
Is 38789 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | No (remainder 1) | 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 1) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | No (remainder 4) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 5) | 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 5) | 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 | No (remainder 9) | 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 5) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 38789 a prime number?
No. 38789 = 79 × 491, so it is divisible by 79.
What are the factors of 38789?
1, 79, 491, 38789.
What is 38789 in binary?
1001011110000101 (hexadecimal 9785, octal 113605).
What is the square root of 38789?
About 196.9492.
Is 38789 divisible by 3?
No. Its digits add up to 35, which is not a multiple of 3.
What is special about the number 38789?
38789 is a semiprime: 79 × 491, the product of two primes.