The number 26438
26438 is a composite number with 4 divisors. Its prime factorisation is 2 × 13219. Divisors (4): 1, 2, 13219, 26438.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 26438: a happy number: repeatedly adding the squares of its digits reaches 1; a semiprime: 2 × 13219, the product of two primes.
- 2
26438 is composite. Its prime factorisation is
- 3
The divisors add up to 39660; without 26438 itself that is 13222, so 26438 is deficient (13222 is less than 26438). Euler's totient φ(26438) = 13218 numbers up to 26438 share no factor with it.
- 4
The digits of 26438 add up to 23, and repeating that until one digit is left gives the digital root 5. The Collatz sequence (halve if even, else 3n+1) takes 139 steps to reach 1.
LaTeX source of the formulas on this page
\[ 26438 = 2 \times 13219 \]
26438 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 39660 |
| Euler totient φ(n) | 13218 |
| Square | 698967844 |
| Cube | 18479311859672 |
| Square root | 162.597663 |
| Digit sum / digital root | 23 / 5 |
| Collatz steps to 1 | 139 |
| Scientific notation | 2.6438 × |
26438 in other forms
| Form | Value |
|---|---|
| In words | twenty-six thousand four hundred and thirty-eight |
| Binary (base 2) | 110011101000110 |
| Octal (base 8) | 63506 |
| Hexadecimal (base 16) | 6746 |
| Base 3 | 1100021012 |
| As time | 26438 seconds = 7 h 20 min 38 s |
Is 26438 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (26438 ÷ 2 = 13219) | 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 | No (remainder 3) | 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 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 6) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 5) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 8) | 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 2) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 26438 a prime number?
No. 26438 = 2 × 13219, so it is divisible by 2.
What are the factors of 26438?
1, 2, 13219, 26438.
What is 26438 in binary?
110011101000110 (hexadecimal 6746, octal 63506).
What is the square root of 26438?
About 162.5977.
Is 26438 divisible by 3?
No. Its digits add up to 23, which is not a multiple of 3.
What is special about the number 26438?
26438 is a happy number: repeatedly adding the squares of its digits reaches 1; a semiprime: 2 × 13219, the product of two primes.