128971121840

Names of 128971121840

• Cardinal: 128971121840 can be written as One hundred twenty-eight billion, nine hundred seventy-one million, one hundred twenty-one thousand, eight hundred forty.

Scientific notation

• Scientific notation: 1.2897112184 × 10¹¹

Factors of 128971121840

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 579322

Divisors of 128971121840

• Number of divisors d(n): 120
• Complete list of divisors:
  1 2 4 5 8 10 11 16 20 22 23 40 44 46 55 80 88 92 110 115 121 176 184 220 230 242 253 368 440 460 484 506 605 880 920 968 1012 1210 1265 1840 1936 2024 2420 2530 2783 4048 4840 5060 5566 9680 10120 11132 13915 20240 22264 27830 44528 55660 111320 222640 579281 1158562 2317124 2896405 4634248 5792810 6372091 9268496 11585620 12744182 13323463 23171240 25488364 26646926 31860455 46342480 50976728 53293852 63720910 66617315 70093001 101953456 106587704 127441820 133234630 140186002 146558093 213175408 254883640 266469260 280372004 293116186 350465005 509767280 532938520 560744008 586232372 700930010 732790465 1065877040 1121488016 1172464744 1401860020 1465580930 1612139023 2344929488 2803720040 2931161860 3224278046 5607440080 5862323720 6448556092 8060695115 11724647440 12897112184 16121390230 25794224368 32242780460 64485560920 128971121840
• Sum of all divisors σ(n): 343926674784
• Sum of proper divisors (its aliquot sum) s(n): 214955552944
• 128971121840 is an abundant number, because the sum of its proper divisors (214955552944) is greater than itself. Its abundance is 85984431104

Bases of 128971121840

• Binary: 1111000000111010001110010010010110000₂
• Hexadecimal: 0x1E074724B0
• Base-36: 1N8Y2QI8

Squares and roots of 128971121840

• 128971121840 squared (128971121840²) is 16633550268668124985600
• 128971121840 cubed (128971121840³) is 2145247638332161482042165845504000
• The square root of 128971121840 is 359125.4959481435
• The cube root of 128971121840 is 5052.3972781759

Scales and comparisons

• 128,971,121,840 seconds is equal to 4,100 years, 45 weeks, 6 days, 7 hours, 37 minutes, 20 seconds.
• To count from 1 to 128,971,121,840 would take you about eight thousand, two hundred one 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 128971121840 cubic inches would be around 421 feet tall.

Recreational maths with 128971121840

• 128971121840 backwards is 048121179821
• 128971121840 is a Harshad number.
• The number of decimal digits it has is: 12
• The sum of 128971121840's digits is 44
• More coming soon!