The number 74090
74090 is a composite number with 16 divisors. Its prime factorisation is 2 × 5 × 31 × 239. Divisors (16): 1, 2, 5, 10, 31, 62, 155, 239, 310, 478, 1195, 2390, 7409, 14818, 37045, 74090.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
74090 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
74090 is composite. Its prime factorisation is
- 3
The divisors add up to 138240; without 74090 itself that is 64150, so 74090 is deficient (64150 is less than 74090). Euler's totient φ(74090) = 28560 numbers up to 74090 share no factor with it.
- 4
The digits of 74090 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 112 steps to reach 1.
LaTeX source of the formulas on this page
\[ 74090 = 2 \times 5 \times 31 \times 239 \]
74090 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 16 |
| Sum of divisors | 138240 |
| Euler totient φ(n) | 28560 |
| Square | 5489328100 |
| Cube | 406704318929000 |
| Square root | 272.194783 |
| Digit sum / digital root | 20 / 2 |
| Collatz steps to 1 | 112 |
| Scientific notation | 7.409 × |
74090 in other forms
| Form | Value |
|---|---|
| In words | seventy-four thousand and ninety |
| Binary (base 2) | 10010000101101010 |
| Octal (base 8) | 220552 |
| Hexadecimal (base 16) | 1216A |
| Base 3 | 10202122002 |
| As time | 74090 seconds = 20 h 34 min 50 s |
Is 74090 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | Yes (74090 ÷ 2 = 37045) | 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 | Yes (74090 ÷ 5 = 14818) | 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 | No (remainder 2) | 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 (74090 ÷ 10 = 7409) | 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 74090 a prime number?
No. 74090 = 2 × 5 × 31 × 239, so it is divisible by 2.
What are the factors of 74090?
1, 2, 5, 10, 31, 62, 155, 239, 310, 478, 1195, 2390, 7409, 14818, 37045, 74090.
What is 74090 in binary?
10010000101101010 (hexadecimal 1216A, octal 220552).
What is the square root of 74090?
About 272.1948.
Is 74090 divisible by 3?
No. Its digits add up to 20, which is not a multiple of 3.
What is special about the number 74090?
It is a composite number with 16 divisors.