The number 5438
5438 is a composite number with 4 divisors. Its prime factorisation is 2 × 2719. Divisors (4): 1, 2, 2719, 5438.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 5438: a semiprime: 2 × 2719, the product of two primes.
- 2
5438 is composite. Its prime factorisation is
- 3
The divisors add up to 8160; without 5438 itself that is 2722, so 5438 is deficient (2722 is less than 5438). Euler's totient φ(5438) = 2718 numbers up to 5438 share no factor with it.
- 4
The digits of 5438 add up to 20, and repeating that until one digit is left gives the digital root 2. The Collatz sequence (halve if even, else 3n+1) takes 67 steps to reach 1.
LaTeX source of the formulas on this page
\[ 5438 = 2 \times 2719 \]
5438 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 8160 |
| Euler totient φ(n) | 2718 |
| Square | 29571844 |
| Cube | 160811687672 |
| Square root | 73.742796 |
| Digit sum / digital root | 20 / 2 |
| Collatz steps to 1 | 67 |
| Scientific notation | 5.438 × |
5438 in other forms
| Form | Value |
|---|---|
| In words | five thousand four hundred and thirty-eight |
| Binary (base 2) | 1010100111110 |
| Octal (base 8) | 12476 |
| Hexadecimal (base 16) | 153E |
| Base 3 | 21110102 |
| As time | 5438 seconds = 1 h 30 min 38 s |
Is 5438 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (5438 ÷ 2 = 2719) | 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 2) | 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 4) | 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 5438 a prime number?
No. 5438 = 2 × 2719, so it is divisible by 2.
What are the factors of 5438?
1, 2, 2719, 5438.
What is 5438 in binary?
1010100111110 (hexadecimal 153E, octal 12476).
What is the square root of 5438?
About 73.7428.
Is 5438 divisible by 3?
No. Its digits add up to 20, which is not a multiple of 3.
What is special about the number 5438?
5438 is a semiprime: 2 × 2719, the product of two primes.