The number 39955
39955 is a composite number with 8 divisors. Its prime factorisation is 5 × 61 × 131. Divisors (8): 1, 5, 61, 131, 305, 655, 7991, 39955.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
39955 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
39955 is composite. Its prime factorisation is
- 3
The divisors add up to 49104; without 39955 itself that is 9149, so 39955 is deficient (9149 is less than 39955). Euler's totient φ(39955) = 31200 numbers up to 39955 share no factor with it.
- 4
The digits of 39955 add up to 31, and repeating that until one digit is left gives the digital root 4. The Collatz sequence (halve if even, else 3n+1) takes 168 steps to reach 1.
LaTeX source of the formulas on this page
\[ 39955 = 5 \times 61 \times 131 \]
39955 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 49104 |
| Euler totient φ(n) | 31200 |
| Square | 1596402025 |
| Cube | 63784242908875 |
| Square root | 199.887468 |
| Digit sum / digital root | 31 / 4 |
| Collatz steps to 1 | 168 |
| Scientific notation | 3.9955 × |
39955 in other forms
| Form | Value |
|---|---|
| In words | thirty-nine thousand nine hundred and fifty-five |
| Binary (base 2) | 1001110000010011 |
| Octal (base 8) | 116023 |
| Hexadecimal (base 16) | 9C13 |
| Base 3 | 2000210211 |
| As time | 39955 seconds = 11 h 5 min 55 s |
Is 39955 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 3) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | Yes (39955 ÷ 5 = 7991) | 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 3) | 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 5) | 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 7) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 39955 a prime number?
No. 39955 = 5 × 61 × 131, so it is divisible by 5.
What are the factors of 39955?
1, 5, 61, 131, 305, 655, 7991, 39955.
What is 39955 in binary?
1001110000010011 (hexadecimal 9C13, octal 116023).
What is the square root of 39955?
About 199.8875.
Is 39955 divisible by 3?
No. Its digits add up to 31, which is not a multiple of 3.
What is special about the number 39955?
It is a composite number with 8 divisors.