19990

Names of 19990

• Cardinal: 19990 can be written as Nineteen thousand, nine hundred ninety.

Scientific notation

• Scientific notation: 1.999 × 10⁴

Factors of 19990

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 2006

Divisors of 19990

• Number of divisors d(n): 8
• Complete list of divisors:
  1 2 5 10 1999 3998 9995 19990
• Sum of all divisors σ(n): 36000
• Sum of proper divisors (its aliquot sum) s(n): 16010
• 19990 is a deficient number, because the sum of its proper divisors (16010) is less than itself. Its deficiency is 3980

Bases of 19990

• Binary: 100111000010110₂
• Hexadecimal: 0x4E16
• Base-36: FFA

Squares and roots of 19990

• 19990 squared (19990²) is 399600100
• 19990 cubed (19990³) is 7988005999000
• The square root of 19990 is 141.3859964777
• The cube root of 19990 is 27.1396513823

Scales and comparisons

• 19,990 seconds is equal to 5 hours, 33 minutes, 10 seconds.
• To count from 1 to 19,990 would take you about five hours.

  This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)

• A cube with a volume of 19990 cubic inches would be around 2.3 feet tall.

Recreational maths with 19990

• 19990 backwards is 09991
• The number of decimal digits it has is: 5
• The sum of 19990's digits is 28
• More coming soon!