The number 56990
56990 is a composite number with 16 divisors. Its prime factorisation is 2 × 5 × 41 × 139. Divisors (16): 1, 2, 5, 10, 41, 82, 139, 205, 278, 410, 695, 1390, 5699, 11398, 28495, 56990.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
56990 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
56990 is composite. Its prime factorisation is
- 3
The divisors add up to 105840; without 56990 itself that is 48850, so 56990 is deficient (48850 is less than 56990). Euler's totient φ(56990) = 22080 numbers up to 56990 share no factor with it.
- 4
The digits of 56990 add up to 29, and repeating that until one digit is left gives the digital root 2. The Collatz sequence (halve if even, else 3n+1) takes 135 steps to reach 1.
LaTeX source of the formulas on this page
\[ 56990 = 2 \times 5 \times 41 \times 139 \]
56990 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 16 |
| Sum of divisors | 105840 |
| Euler totient φ(n) | 22080 |
| Square | 3247860100 |
| Cube | 185095547099000 |
| Square root | 238.725784 |
| Digit sum / digital root | 29 / 2 |
| Collatz steps to 1 | 135 |
| Scientific notation | 5.699 × |
56990 in other forms
| Form | Value |
|---|---|
| In words | fifty-six thousand nine hundred and ninety |
| Binary (base 2) | 1101111010011110 |
| Octal (base 8) | 157236 |
| Hexadecimal (base 16) | DE9E |
| Base 3 | 2220011202 |
| As time | 56990 seconds = 15 h 49 min 50 s |
Is 56990 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (56990 ÷ 2 = 28495) | 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 | Yes (56990 ÷ 5 = 11398) | 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 3) | 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 6) | 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 | Yes (56990 ÷ 10 = 5699) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 10) | 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 56990 a prime number?
No. 56990 = 2 × 5 × 41 × 139, so it is divisible by 2.
What are the factors of 56990?
1, 2, 5, 10, 41, 82, 139, 205, 278, 410, 695, 1390, 5699, 11398, 28495, 56990.
What is 56990 in binary?
1101111010011110 (hexadecimal DE9E, octal 157236).
What is the square root of 56990?
About 238.7258.
Is 56990 divisible by 3?
No. Its digits add up to 29, which is not a multiple of 3.
What is special about the number 56990?
It is a composite number with 16 divisors.