The Number

1805

One Thousand Eight Hundred and Five

In Base 18 Octodecimal Is

5a518

The numbers with a 18 subscript use Base 18 Octodecimal notation.

For more familiar numbers: See One Thousand Eight Hundred and Five in Base 10 Decimal

Nearby Numbers

Positive, nonzero integers within three units

1802
5a218
One Thousand Eight Hundred and Two in Base 18 Octodecimal
1803
5a318
One Thousand Eight Hundred and Three in Base 18 Octodecimal
1804
5a418
One Thousand Eight Hundred and Four in Base 18 Octodecimal
1806
5a618
One Thousand Eight Hundred and Six in Base 18 Octodecimal
1807
5a718
One Thousand Eight Hundred and Seven in Base 18 Octodecimal
1808
5a818
One Thousand Eight Hundred and Eight in Base 18 Octodecimal

Scientific Notation

Scientific notation expresses a quantity as the product of its significand with 10 raised to an integer exponent.

1.805e3

Reciprocal

A number multiplied with its reciprocal is one.

0.00342f615c8g89c18

The reciprocal of 1805 in Base 18 Octodecimal.

Palindrome?

A numerical palindrome has the same value when all of its digits are reversed.

The number 5a518 is a palindrome.

Not A Prime Number

A prime number is a positive integer that is divisible only by itself and one.

One thousand eight hundred and five is a composite number with 6 total factors (including 1 and itself).   See primes in Base 18 Octodecimal

A Composite

Composites have more than just these two factors.

One thousand eight hundred and five is a composite number with 6 total factors (including 1 and itself).

Prime Factors

The prime factors of a positive integer are the integers that divide it exactly and are also prime.

The number one thousand eight hundred and five has the following 2 prime factors:

5
518
Five in Base 18 Octodecimal
19
1118
Nineteen in Base 18 Octodecimal

Prime Factorization

The prime factorization of a positive integer is the unique list of prime factors together with their multiplicities

5181 · 11182 = 5a518

Base Conversions

The number one thousand eight hundred and five in 35 different bases