The Number
90
Ninety
In Base 20 Vigesimal Is
4a20
The numbers with a 20 subscript use Base 20 Vigesimal notation.
For more familiar numbers: See Ninety in Base 10 Decimal
Nearby Numbers
Positive, nonzero integers within three units
Scientific Notation
Scientific notation expresses a quantity as the product of its significand with 10 raised to an integer exponent.
9e1
Reciprocal
A number multiplied with its reciprocal is one.
0.048hfb248hfb2520
The reciprocal of 90 in Base 20 Vigesimal.
Palindrome?
A numerical palindrome has the same value when all of its digits are reversed.
The number 4a20 is not a palindrome.
Not A Prime Number
A prime number is a positive integer that is divisible only by itself and one.
Ninety is a composite number with 12 total factors (including 1 and itself). See primes in Base 20 Vigesimal
A Composite
Composites have more than just these two factors.
Ninety is a composite number with 12 total factors (including 1 and itself).
Prime Factors
The number ninety has the following 3 prime factors:
Prime Factorization
The prime factorization of a positive integer is the unique list of prime factors together with their multiplicities
2201
·
3202
·
5201
= 4a20
Base Conversions
The number ninety in 35 different bases