The Number
1640
One Thousand Six Hundred and Forty
In Base 21 Unovigesimal Is
3f221
The numbers with a 21 subscript use Base 21 Unovigesimal notation.
For more familiar numbers: See One Thousand Six Hundred and Forty 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.
1.640e3
Reciprocal
A number multiplied with its reciprocal is one.
0.005dc68f2c10g8721
The reciprocal of 1640 in Base 21 Unovigesimal.
Palindrome?
A numerical palindrome has the same value when all of its digits are reversed.
The number 3f221 is not a palindrome.
Not A Prime Number
A prime number is a positive integer that is divisible only by itself and one.
One thousand six hundred and forty is a composite number with 16 total factors (including 1 and itself). See primes in Base 21 Unovigesimal
A Composite
Composites have more than just these two factors.
One thousand six hundred and forty is a composite number with 16 total factors (including 1 and itself).
Prime Factors
The number one thousand six hundred and forty 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
2213
·
5211
·
1k211
= 3f221
Base Conversions
The number one thousand six hundred and forty in 35 different bases