19980

Names of 19980

• Cardinal: 19980 can be written as Nineteen thousand, nine hundred eighty.

Scientific notation

• Scientific notation: 1.998 × 10⁴

Factors of 19980

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 47

Divisors of 19980

• Number of divisors d(n): 48
• Complete list of divisors:
  1 2 3 4 5 6 9 10 12 15 18 20 27 30 36 37 45 54 60 74 90 108 111 135 148 180 185 222 270 333 370 444 540 555 666 740 999 1110 1332 1665 1998 2220 3330 3996 4995 6660 9990 19980
• Sum of all divisors σ(n): 63840
• Sum of proper divisors (its aliquot sum) s(n): 43860
• 19980 is an abundant number, because the sum of its proper divisors (43860) is greater than itself. Its abundance is 23880

Bases of 19980

• Binary: 100111000001100₂
• Hexadecimal: 0x4E0C
• Base-36: FF0

Squares and roots of 19980

• 19980 squared (19980²) is 399200400
• 19980 cubed (19980³) is 7976023992000
• The square root of 19980 is 141.3506278727
• The cube root of 19980 is 27.1351250895

Scales and comparisons

• 19,980 seconds is equal to 5 hours, 33 minutes.
• To count from 1 to 19,980 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 19980 cubic inches would be around 2.3 feet tall.

Recreational maths with 19980

• 19980 backwards is 08991
• 19980 is a Harshad number.
• The number of decimal digits it has is: 5
• The sum of 19980's digits is 27
• More coming soon!