1990518180

Names of 1990518180

• Cardinal: 1990518180 can be written as One billion, nine hundred ninety million, five hundred eighteen thousand, one hundred eighty.

Scientific notation

• Scientific notation: 1.99051818 × 10⁹

Factors of 1990518180

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 328

Divisors of 1990518180

• Number of divisors d(n): 144
• Complete list of divisors:
  1 2 3 4 5 6 7 10 12 14 15 20 21 28 30 35 42 49 60 70 84 98 105 140 147 196 210 245 294 311 343 420 490 588 622 686 735 933 980 1029 1244 1372 1470 1555 1715 1866 2058 2177 2940 3110 3430 3732 4116 4354 4665 5145 6220 6531 6860 8708 9330 10290 10885 13062 15239 18660 20580 21770 26124 30478 32655 43540 45717 60956 65310 76195 91434 96721 106673 130620 152390 182868 193442 213346 228585 290163 304780 320019 386884 426692 457170 483605 533365 580326 640038 677047 914340 967210 1066730 1160652 1280076 1354094 1450815 1600095 1934420 2031141 2133460 2708188 2901630 3200190 3385235 4062282 4739329 5803260 6400380 6770470 8124564 9478658 10155705 13540940 14217987 18957316 20311410 23696645 28435974 33175303 40622820 47393290 56871948 66350606 71089935 94786580 99525909 132701212 142179870 165876515 199051818 284359740 331753030 398103636 497629545 663506060 995259090 1990518180
• Sum of all divisors σ(n): 6520617600
• Sum of proper divisors (its aliquot sum) s(n): 4530099420
• 1990518180 is an abundant number, because the sum of its proper divisors (4530099420) is greater than itself. Its abundance is 2539581240

Bases of 1990518180

• Binary: 1110110101001001110010110100100₂
• Hexadecimal: 0x76A4E5A4
• Base-36: WX3PNO

Squares and roots of 1990518180

• 1990518180 squared (1990518180²) is 3962162624910512400
• 1990518180 cubed (1990518180³) is 7886756737000895805315432000
• The square root of 1990518180 is 44615.2236349881
• The cube root of 1990518180 is 1257.9268376717

Scales and comparisons

• 1,990,518,180 seconds is equal to 63 years, 15 weeks, 1 day, 9 hours, 43 minutes.
• To count from 1 to 1,990,518,180 would take you about one hundred twenty-six years!

  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 1990518180 cubic inches would be around 104.8 feet tall.

Recreational maths with 1990518180

• 1990518180 backwards is 0818150991
• 1990518180 is a Harshad number.
• The number of decimal digits it has is: 10
• The sum of 1990518180's digits is 42
• More coming soon!