870
870 is a even composite number that follows 869 and precedes 871. It is composed of 16 distinct factors: 1, 2, 3, 5, 6, 10, 15, 29, 30, 58, 87, 145, 174, 290, 435, 870. Its prime factorization can be written as 2 × 3 × 5 × 29. 870 is classified as a abundant number based on the sum of its proper divisors. In computer science, 870 is represented as 1101100110 in binary and 366 in hexadecimal. Historically, it is written as DCCCLXX in Roman numerals.
Factor Analysis
16 FactorsProperties
The prime factorization (2 × 3 × 5 × 29) reveals 4 prime building blocks.
Divisible by 2
870 ends in 0, so it is even.
Divisible by 3
The digit sum 15 is a multiple of 3.
Divisible by 4
The last two digits 70 are not divisible by 4.
Divisible by 5
870 ends in 0, so it is divisible by 5.
Divisible by 6
It meets the tests for both 2 and 3, so it is divisible by 6.
Divisible by 9
The digit sum 15 is not a multiple of 9.
Divisible by 10
870 ends in 0.
Divisible by 11
The alternating digit sum 1 is not a multiple of 11.
Abundant classification and digit analytics place 870 within several notable number theory sequences:
Timeline
Deep dive
How 870 breaks down
870 carries 16 distinct factors and a digit signature of 15 (6 as the digital root). The abundant classification indicates that its proper divisors sum to 1290, which exceeds the number, offering a quick glimpse into its abundance profile.
Numeral conversions provide additional context: the binary form 1101100110 supports bitwise reasoning, hexadecimal 366 aligns with computing notation, and the Roman numeral DCCCLXX keeps the encyclopedic tradition alive. These attributes make 870 useful for math olympiad problems, puzzle design, and code challenges alike.
Context
Where 870 shows up
Engineers lean on the divisibility profile when sizing circuits, mod designers use neighboring values (865–875) to tune search ranges, and educators feature 870 in worksheets about factor trees. Its binary footprint of length 10 bits also makes it a solid example for teaching storage limits and overflow.
Beyond STEM, the classification and sequence tags (Composite numbers, Abundant numbers) help historians, numerologists, and trivia writers tie 870 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 870
Is 870 a prime number?
870 is composite with 16 total factors and the prime factorization 2 × 3 × 5 × 29.
What is the prime factorization of 870?
It breaks down as 2 × 3 × 5 × 29, multiplying the primes 2 × 3 × 5 × 29.
How is 870 represented in binary and hexadecimal?
870 converts to 1101100110 in binary and 366 in hexadecimal, which are helpful for computer science applications.
Is 870 a perfect square, cube, or triangular number?
870 is not a perfect square, is not a perfect cube, and is not triangular.
What are the digit sum and digital root of 870?
The digits sum to 15, producing a digital root of 6. These tests power divisibility shortcuts for 3 and 9.