2×89

2×89 denotes the product of the integers 2 and 89. The calculation yields 178, a simple example of doubling a positive integer.

The number 89 has mathematical and historical interest. It is a Fibonacci number (specifically F11 in the standard sequence where F1 = 1, F2 = 1) and it is prime. In the context of Fibonacci numbers, 89 is one of the well-known primes among the sequence, and it lies between 55 and 144.

178 is the product of two primes, namely 2 and 89, which makes it a semiprime. Its prime factorization is 2 × 89, and its positive divisors are 1, 2, 89, and 178. As an even number, 178 is divisible by 2 and is not a prime.

Representations of 178 include several common numeral systems. In decimal it is 178; in binary it is 10110010; in octal it is 262; in hexadecimal it is B2. In Roman numerals, 178 is written as CLXXVIII.

In summary, 2×89 results in 178, a semiprime formed by doubling a prime Fibonacci number. The value can be expressed in multiple bases and numeral systems, and its factorization is straightforward: 2 × 89.