The number 26990
26990 is a composite number with 8 divisors. Its prime factorisation is 2 × 5 × 2699. Divisors (8): 1, 2, 5, 10, 2699, 5398, 13495, 26990.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
26990 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
26990 is composite. Its prime factorisation is
- 3
The divisors add up to 48600; without 26990 itself that is 21610, so 26990 is deficient (21610 is less than 26990). Euler's totient φ(26990) = 10792 numbers up to 26990 share no factor with it.
- 4
The digits of 26990 add up to 26, and repeating that until one digit is left gives the digital root 8. The Collatz sequence (halve if even, else 3n+1) takes 183 steps to reach 1.
LaTeX source of the formulas on this page
\[ 26990 = 2 \times 5 \times 2699 \]
26990 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 48600 |
| Euler totient φ(n) | 10792 |
| Square | 728460100 |
| Cube | 19661138099000 |
| Square root | 164.286335 |
| Digit sum / digital root | 26 / 8 |
| Collatz steps to 1 | 183 |
| Scientific notation | 2.699 × |
26990 in other forms
| Form | Value |
|---|---|
| In words | twenty-six thousand nine hundred and ninety |
| Binary (base 2) | 110100101101110 |
| Octal (base 8) | 64556 |
| Hexadecimal (base 16) | 696E |
| Base 3 | 1101000122 |
| As time | 26990 seconds = 7 h 29 min 50 s |
Is 26990 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (26990 ÷ 2 = 13495) | 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 (26990 ÷ 5 = 5398) | 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 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 6) | 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 | Yes (26990 ÷ 10 = 2699) | 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 2) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 26990 a prime number?
No. 26990 = 2 × 5 × 2699, so it is divisible by 2.
What are the factors of 26990?
1, 2, 5, 10, 2699, 5398, 13495, 26990.
What is 26990 in binary?
110100101101110 (hexadecimal 696E, octal 64556).
What is the square root of 26990?
About 164.2863.
Is 26990 divisible by 3?
No. Its digits add up to 26, which is not a multiple of 3.
What is special about the number 26990?
It is a composite number with 8 divisors.