The number 38989
38989 is a composite number with 4 divisors. Its prime factorisation is 127 × 307. Divisors (4): 1, 127, 307, 38989.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 38989: a semiprime: 127 × 307, the product of two primes.
- 2
38989 is composite. Its prime factorisation is
- 3
The divisors add up to 39424; without 38989 itself that is 435, so 38989 is deficient (435 is less than 38989). Euler's totient φ(38989) = 38556 numbers up to 38989 share no factor with it.
- 4
The digits of 38989 add up to 37, and repeating that until one digit is left gives the digital root 1. The Collatz sequence (halve if even, else 3n+1) takes 124 steps to reach 1.
LaTeX source of the formulas on this page
\[ 38989 = 127 \times 307 \]
38989 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 39424 |
| Euler totient φ(n) | 38556 |
| Square | 1520142121 |
| Cube | 59268821155669 |
| Square root | 197.456324 |
| Digit sum / digital root | 37 / 1 |
| Collatz steps to 1 | 124 |
| Scientific notation | 3.8989 × |
38989 in other forms
| Form | Value |
|---|---|
| In words | thirty-eight thousand nine hundred and eighty-nine |
| Binary (base 2) | 1001100001001101 |
| Octal (base 8) | 114115 |
| Hexadecimal (base 16) | 984D |
| Base 3 | 1222111001 |
| As time | 38989 seconds = 10 h 49 min 49 s |
Is 38989 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 1) | 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 1) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 6) | 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 1) | 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 5) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 1) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 38989 a prime number?
No. 38989 = 127 × 307, so it is divisible by 127.
What are the factors of 38989?
1, 127, 307, 38989.
What is 38989 in binary?
1001100001001101 (hexadecimal 984D, octal 114115).
What is the square root of 38989?
About 197.4563.
Is 38989 divisible by 3?
No. Its digits add up to 37, which is not a multiple of 3.
What is special about the number 38989?
38989 is a semiprime: 127 × 307, the product of two primes.