The Number

28

Twenty-Eight

In Base 20 Vigesimal Is

1820

The numbers with a 20 subscript use Base 20 Vigesimal notation.

For more familiar numbers: See Twenty-Eight in Base 10 Decimal

Nearby Numbers

Positive, nonzero integers within three units

25
1520
Twenty-Five in Base 20 Vigesimal
26
1620
Twenty-Six in Base 20 Vigesimal
27
1720
Twenty-Seven in Base 20 Vigesimal
29
1920
Twenty-Nine in Base 20 Vigesimal
30
1a20
Thirty in Base 20 Vigesimal
31
1b20
Thirty-One in Base 20 Vigesimal

Scientific Notation

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

2.8e1

Reciprocal

A number multiplied with its reciprocal is one.

0.0e5e5e5e5e5e5a20

The reciprocal of 28 in Base 20 Vigesimal.

Palindrome?

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

The number 1820 is not a palindrome.

Not A Prime Number

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

Twenty-eight is a composite number with 6 total factors (including 1 and itself).   See primes in Base 20 Vigesimal

A Composite

Composites have more than just these two factors.

Twenty-eight 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 twenty-eight has the following 2 prime factors:

2
220
Two in Base 20 Vigesimal
7
720
Seven in Base 20 Vigesimal

Prime Factorization

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

2202 · 7201 = 1820

Base Conversions

The number twenty-eight in 35 different bases