1816
1816 is a even composite number that follows 1815 and precedes 1817. It is composed of 8 distinct factors: 1, 2, 4, 8, 227, 454, 908, 1816. Its prime factorization can be written as 2^3 × 227. 1816 is classified as a deficient number based on the sum of its proper divisors. In computer science, 1816 is represented as 11100011000 in binary and 718 in hexadecimal. Historically, it is written as MDCCCXVI in Roman numerals.
Factor Analysis
8 FactorsProperties
The prime factorization (2^3 × 227) reveals 4 prime building blocks.
Divisible by 2
1816 ends in 6, so it is even.
Divisible by 3
The digit sum 16 is not a multiple of 3.
Divisible by 4
The last two digits 16 form a multiple of 4.
Divisible by 5
1816 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 16 is not a multiple of 9.
Divisible by 10
1816 does not end in 0.
Divisible by 11
The alternating digit sum -12 is not a multiple of 11.
Deficient classification and digit analytics place 1816 within several notable number theory sequences:
Timeline
Deep dive
How 1816 breaks down
1816 carries 8 distinct factors and a digit signature of 16 (7 as the digital root). The deficient classification indicates that its proper divisors sum to 1604, which stays below the number, offering a quick glimpse into its abundance profile.
Numeral conversions provide additional context: the binary form 11100011000 supports bitwise reasoning, hexadecimal 718 aligns with computing notation, and the Roman numeral MDCCCXVI keeps the encyclopedic tradition alive. These attributes make 1816 useful for math olympiad problems, puzzle design, and code challenges alike.
Context
Where 1816 shows up
Engineers lean on the divisibility profile when sizing circuits, mod designers use neighboring values (1811–1821) to tune search ranges, and educators feature 1816 in worksheets about factor trees. Its binary footprint of length 11 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 1816 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 1816
Is 1816 a prime number?
1816 is composite with 8 total factors and the prime factorization 2^3 × 227.
What is the prime factorization of 1816?
It breaks down as 2^3 × 227, multiplying the primes 2 × 2 × 2 × 227.
How is 1816 represented in binary and hexadecimal?
1816 converts to 11100011000 in binary and 718 in hexadecimal, which are helpful for computer science applications.
Is 1816 a perfect square, cube, or triangular number?
1816 is not a perfect square, is not a perfect cube, and is not triangular.
What are the digit sum and digital root of 1816?
The digits sum to 16, producing a digital root of 7. These tests power divisibility shortcuts for 3 and 9.