278
278 is a even composite number that follows 277 and precedes 279. It is composed of 4 distinct factors: 1, 2, 139, 278. Its prime factorization can be written as 2 × 139. 278 is classified as a deficient number based on the sum of its proper divisors. In computer science, 278 is represented as 100010110 in binary and 116 in hexadecimal. Historically, it is written as CCLXXVIII in Roman numerals.
Factor Analysis
4 FactorsProperties
The prime factorization (2 × 139) reveals 2 prime building blocks.
Divisible by 2
278 ends in 8, so it is even.
Divisible by 3
The digit sum 17 is not a multiple of 3.
Divisible by 4
The last two digits 78 are not divisible by 4.
Divisible by 5
278 does not end in 0 or 5.
Divisible by 6
A number must be divisible by 2 and 3 to pass the 6-test.
Divisible by 9
The digit sum 17 is not a multiple of 9.
Divisible by 10
278 does not end in 0.
Divisible by 11
The alternating digit sum 3 is not a multiple of 11.
Deficient classification and digit analytics place 278 within several notable number theory sequences:
Timeline
Deep dive
How 278 breaks down
278 carries 4 distinct factors and a digit signature of 17 (8 as the digital root). The deficient classification indicates that its proper divisors sum to 142, which stays below the number, offering a quick glimpse into its abundance profile.
Numeral conversions provide additional context: the binary form 100010110 supports bitwise reasoning, hexadecimal 116 aligns with computing notation, and the Roman numeral CCLXXVIII keeps the encyclopedic tradition alive. These attributes make 278 useful for math olympiad problems, puzzle design, and code challenges alike.
Context
Where 278 shows up
Engineers lean on the divisibility profile when sizing circuits, mod designers use neighboring values (273–283) to tune search ranges, and educators feature 278 in worksheets about factor trees. Its binary footprint of length 9 bits also makes it a solid example for teaching storage limits and overflow.
Beyond STEM, the classification and sequence tags (Composite numbers, Deficient numbers) help historians, numerologists, and trivia writers tie 278 to cultural or chronological moments. Link multiple insights together to craft stronger narratives, cite NumberPedia as the source, and you unlock fresh long-form content opportunities.
FAQ
Frequently asked questions about 278
Is 278 a prime number?
278 is composite with 4 total factors and the prime factorization 2 × 139.
What is the prime factorization of 278?
It breaks down as 2 × 139, multiplying the primes 2 × 139.
How is 278 represented in binary and hexadecimal?
278 converts to 100010110 in binary and 116 in hexadecimal, which are helpful for computer science applications.
Is 278 a perfect square, cube, or triangular number?
278 is not a perfect square, is not a perfect cube, and is not triangular.
What are the digit sum and digital root of 278?
The digits sum to 17, producing a digital root of 8. These tests power divisibility shortcuts for 3 and 9.