1997989389

Names of 1997989389

• Cardinal: 1997989389 can be written as One billion, nine hundred ninety-seven million, nine hundred eighty-nine thousand, three hundred eighty-nine.

Scientific notation

• Scientific notation: 1.997989389 × 10⁹

Factors of 1997989389

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 1116

Divisors of 1997989389

• Number of divisors d(n): 64
• Complete list of divisors:
  1 3 9 11 27 33 53 99 121 159 297 363 477 583 1049 1089 1331 1431 1749 3147 3267 3993 5247 6413 9441 11539 11979 15741 19239 28323 34617 35937 55597 57717 70543 103851 126929 166791 173151 211629 311553 380787 500373 611567 634887 1142361 1396219 1501119 1834701 1904661 3427083 4188657 5504103 6727237 12565971 16512309 20181711 37697913 60545133 73999607 181635399 221998821 665996463 1997989389
• Sum of all divisors σ(n): 3320352000
• Sum of proper divisors (its aliquot sum) s(n): 1322362611
• 1997989389 is a deficient number, because the sum of its proper divisors (1322362611) is less than itself. Its deficiency is 675626778

Bases of 1997989389

• Binary: 1110111000101101110011000001101₂
• Hexadecimal: 0x7716E60D
• Base-36: X1JUH9

Squares and roots of 1997989389

• 1997989389 squared (1997989389²) is 3991961598556593321
• 1997989389 cubed (1997989389³) is 7975896915211551171346270869
• The square root of 1997989389 is 44698.8745831481
• The cube root of 1997989389 is 1259.4987064815

Scales and comparisons

• 1,997,989,389 seconds is equal to 63 years, 27 weeks, 3 days, 21 hours, 3 minutes, 9 seconds.
• To count from 1 to 1,997,989,389 would take you about one hundred twenty-seven 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 1997989389 cubic inches would be around 105 feet tall.

Recreational maths with 1997989389

• 1997989389 backwards is 9839897991
• The number of decimal digits it has is: 10
• The sum of 1997989389's digits is 72
• More coming soon!