The number 67438
67438 is a composite number with 8 divisors. Its prime factorisation is 2 × 7 × 4817. Divisors (8): 1, 2, 7, 14, 4817, 9634, 33719, 67438.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
67438 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
67438 is composite. Its prime factorisation is
- 3
The divisors add up to 115632; without 67438 itself that is 48194, so 67438 is deficient (48194 is less than 67438). Euler's totient φ(67438) = 28896 numbers up to 67438 share no factor with it.
- 4
The digits of 67438 add up to 28, and repeating that until one digit is left gives the digital root 1. The Collatz sequence (halve if even, else 3n+1) takes 60 steps to reach 1.
LaTeX source of the formulas on this page
\[ 67438 = 2 \times 7 \times 4817 \]
67438 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 115632 |
| Euler totient φ(n) | 28896 |
| Square | 4547883844 |
| Cube | 306700190671672 |
| Square root | 259.688275 |
| Digit sum / digital root | 28 / 1 |
| Collatz steps to 1 | 60 |
| Scientific notation | 6.7438 × |
67438 in other forms
| Form | Value |
|---|---|
| In words | sixty-seven thousand four hundred and thirty-eight |
| Binary (base 2) | 10000011101101110 |
| Octal (base 8) | 203556 |
| Hexadecimal (base 16) | 1076E |
| Base 3 | 10102111201 |
| As time | 67438 seconds = 18 h 43 min 58 s |
Is 67438 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (67438 ÷ 2 = 33719) | 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 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 4) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | Yes (67438 ÷ 7 = 9634) | 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 1) | 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 8) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 10) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 67438 a prime number?
No. 67438 = 2 × 7 × 4817, so it is divisible by 2.
What are the factors of 67438?
1, 2, 7, 14, 4817, 9634, 33719, 67438.
What is 67438 in binary?
10000011101101110 (hexadecimal 1076E, octal 203556).
What is the square root of 67438?
About 259.6883.
Is 67438 divisible by 3?
No. Its digits add up to 28, which is not a multiple of 3.
What is special about the number 67438?
It is a composite number with 8 divisors.