The number 61400
61400 is a composite number with 24 divisors. Its prime factorisation is × × 307. Divisors (24): 1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 200, 307, 614, 1228, 1535 … 61400.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
61400 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
61400 is composite. Its prime factorisation is
- 3
The divisors add up to 143220; without 61400 itself that is 81820, so 61400 is abundant (81820 is more than 61400). Euler's totient φ(61400) = 24480 numbers up to 61400 share no factor with it.
- 4
The digits of 61400 add up to 11, and repeating that until one digit is left gives the digital root 2. The Collatz sequence (halve if even, else 3n+1) takes 179 steps to reach 1.
LaTeX source of the formulas on this page
\[ 61400 = 2^{3} \times 5^{2} \times 307 \]61400 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 24 |
| Sum of divisors | 143220 |
| Euler totient φ(n) | 24480 |
| Square | 3769960000 |
| Cube | 231475544000000 |
| Square root | 247.790234 (= 10√614) |
| Digit sum / digital root | 11 / 2 |
| Collatz steps to 1 | 179 |
| Scientific notation | 6.14 × |
61400 in other forms
| Form | Value |
|---|---|
| In words | sixty-one thousand four hundred |
| Binary (base 2) | 1110111111011000 |
| Octal (base 8) | 167730 |
| Hexadecimal (base 16) | EFD8 |
| Base 3 | 10010020002 |
| As time | 61400 seconds = 17 h 3 min 20 s |
Is 61400 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (61400 ÷ 2 = 30700) | 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 | Yes (61400 ÷ 4 = 15350) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | Yes (61400 ÷ 5 = 12280) | 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 | Yes (61400 ÷ 8 = 7675) | 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 (61400 ÷ 10 = 6140) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 9) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 8) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 61400 a prime number?
No. 61400 = × × 307, so it is divisible by 2.
What are the factors of 61400?
1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 200, 307, 614, 1228, 1535, 2456, 3070, 6140, 7675, 12280, 15350, 30700, 61400.
What is 61400 in binary?
1110111111011000 (hexadecimal EFD8, octal 167730).
What is the square root of 61400?
About 247.7902, exactly 10√614.
Is 61400 divisible by 3?
No. Its digits add up to 11, which is not a multiple of 3.
What is special about the number 61400?
It is a composite number with 24 divisors.