The number 61448
61448 is a composite number with 8 divisors. Its prime factorisation is × 7681. Divisors (8): 1, 2, 4, 8, 7681, 15362, 30724, 61448.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 61448: a happy number: repeatedly adding the squares of its digits reaches 1.
- 2
61448 is composite. Its prime factorisation is
- 3
The divisors add up to 115230; without 61448 itself that is 53782, so 61448 is deficient (53782 is less than 61448). Euler's totient φ(61448) = 30720 numbers up to 61448 share no factor with it.
- 4
The digits of 61448 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 179 steps to reach 1.
LaTeX source of the formulas on this page
\[ 61448 = 2^{3} \times 7681 \]61448 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 115230 |
| Euler totient φ(n) | 30720 |
| Square | 3775856704 |
| Cube | 232018842747392 |
| Square root | 247.887071 (= 2√15362) |
| Digit sum / digital root | 23 / 5 |
| Collatz steps to 1 | 179 |
| Scientific notation | 6.1448 × |
61448 in other forms
| Form | Value |
|---|---|
| In words | sixty-one thousand four hundred and forty-eight |
| Binary (base 2) | 1111000000001000 |
| Octal (base 8) | 170010 |
| Hexadecimal (base 16) | F008 |
| Base 3 | 10010021212 |
| As time | 61448 seconds = 17 h 4 min 8 s |
Is 61448 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (61448 ÷ 2 = 30724) | 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 (61448 ÷ 4 = 15362) | 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 2) | 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 (61448 ÷ 8 = 7681) | 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 2) | 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 61448 a prime number?
No. 61448 = × 7681, so it is divisible by 2.
What are the factors of 61448?
1, 2, 4, 8, 7681, 15362, 30724, 61448.
What is 61448 in binary?
1111000000001000 (hexadecimal F008, octal 170010).
What is the square root of 61448?
About 247.8871, exactly 2√15362.
Is 61448 divisible by 3?
No. Its digits add up to 23, which is not a multiple of 3.
What is special about the number 61448?
61448 is a happy number: repeatedly adding the squares of its digits reaches 1.