19989990

Names of 19989990

• Cardinal: 19989990 can be written as Nineteen million, nine hundred eighty-nine thousand, nine hundred ninety.

Scientific notation

• Scientific notation: 1.998999 × 10⁷

Factors of 19989990

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 99

Divisors of 19989990

• Number of divisors d(n): 160
• Complete list of divisors:
  1 2 3 5 6 9 10 15 18 23 27 29 30 37 45 46 54 58 69 74 81 87 90 111 115 135 138 145 162 174 185 207 222 230 261 270 290 333 345 370 405 414 435 522 555 621 666 667 690 783 810 851 870 999 1035 1073 1110 1242 1305 1334 1566 1665 1702 1863 1998 2001 2070 2146 2349 2553 2610 2997 3105 3219 3330 3335 3726 3915 4002 4255 4698 4995 5106 5365 5994 6003 6210 6438 6670 7659 7830 8510 9315 9657 9990 10005 10730 11745 12006 12765 14985 15318 16095 18009 18630 19314 20010 22977 23490 24679 25530 28971 29970 30015 32190 36018 38295 45954 48285 49358 54027 57942 60030 68931 74037 76590 86913 90045 96570 108054 114885 123395 137862 144855 148074 173826 180090 222111 229770 246790 270135 289710 344655 370185 434565 444222 540270 666333 689310 740370 869130 1110555 1332666 1998999 2221110 3331665 3997998 6663330 9994995 19989990
• Sum of all divisors σ(n): 59590080
• Sum of proper divisors (its aliquot sum) s(n): 39600090
• 19989990 is an abundant number, because the sum of its proper divisors (39600090) is greater than itself. Its abundance is 19610100

Bases of 19989990

• Binary: 1001100010000010111100110₂
• Hexadecimal: 0x13105E6
• Base-36: BWGDI

Squares and roots of 19989990

• 19989990 squared (19989990²) is 399599700200100
• 19989990 cubed (19989990³) is 7987994011002996999000
• The square root of 19989990 is 4471.0166629079
• The cube root of 19989990 is 271.3964685683

Scales and comparisons

• 19,989,990 seconds is equal to 33 weeks, 8 hours, 46 minutes, 30 seconds.
• To count from 1 to 19,989,990 would take you about forty-nine weeks!

  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 19989990 cubic inches would be around 22.6 feet tall.

Recreational maths with 19989990

• 19989990 backwards is 09998991
• 19989990 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 19989990's digits is 54
• More coming soon!