158
158 is a even composite number that follows 157 and precedes 159. It is composed of 4 distinct factors: 1, 2, 79, 158. Its prime factorization can be written as 2 × 79. 158 is classified as a deficient number based on the sum of its proper divisors. In computer science, 158 is represented as 10011110 in binary and 9E in hexadecimal. Historically, it is written as CLVIII in Roman numerals.
Factor Analysis
4 FactorsProperties
The prime factorization (2 × 79) reveals 2 prime building blocks.
Divisible by 2
158 ends in 8, so it is even.
Divisible by 3
The digit sum 14 is not a multiple of 3.
Divisible by 4
The last two digits 58 are not divisible by 4.
Divisible by 5
158 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 14 is not a multiple of 9.
Divisible by 10
158 does not end in 0.
Divisible by 11
The alternating digit sum 4 is not a multiple of 11.
Deficient classification and digit analytics place 158 within several notable number theory sequences:
Timeline
Deep dive
How 158 breaks down
158 carries 4 distinct factors and a digit signature of 14 (5 as the digital root). The deficient classification indicates that its proper divisors sum to 82, which stays below the number, offering a quick glimpse into its abundance profile.
Numeral conversions provide additional context: the binary form 10011110 supports bitwise reasoning, hexadecimal 9E aligns with computing notation, and the Roman numeral CLVIII keeps the encyclopedic tradition alive. These attributes make 158 useful for math olympiad problems, puzzle design, and code challenges alike.
Context
Where 158 shows up
Engineers lean on the divisibility profile when sizing circuits, mod designers use neighboring values (153–163) to tune search ranges, and educators feature 158 in worksheets about factor trees. Its binary footprint of length 8 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 158 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 158
Is 158 a prime number?
158 is composite with 4 total factors and the prime factorization 2 × 79.
What is the prime factorization of 158?
It breaks down as 2 × 79, multiplying the primes 2 × 79.
How is 158 represented in binary and hexadecimal?
158 converts to 10011110 in binary and 9E in hexadecimal, which are helpful for computer science applications.
Is 158 a perfect square, cube, or triangular number?
158 is not a perfect square, is not a perfect cube, and is not triangular.
What are the digit sum and digital root of 158?
The digits sum to 14, producing a digital root of 5. These tests power divisibility shortcuts for 3 and 9.