128788767990

Names of 128788767990

• Cardinal: 128788767990 can be written as One hundred twenty-eight billion, seven hundred eighty-eight million, seven hundred sixty-seven thousand, nine hundred ninety.

Scientific notation

• Scientific notation: 1.2878876799 × 10¹¹

Factors of 128788767990

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 7756

Divisors of 128788767990

• Number of divisors d(n): 192
• Complete list of divisors:
  1 2 3 5 6 9 10 15 18 19 27 30 38 45 54 57 81 90 95 114 135 162 171 190 243 270 285 342 361 405 486 513 570 722 810 855 1026 1083 1215 1539 1710 1805 2166 2430 2565 3078 3249 3610 4617 5130 5415 6498 6859 7695 7727 9234 9747 10830 13718 15390 15454 16245 19494 20577 23085 23181 29241 32490 34295 38635 41154 46170 46362 48735 58482 61731 68590 69543 77270 87723 97470 102885 115905 123462 139086 146205 146813 175446 185193 205770 208629 231810 292410 293626 308655 347715 370386 417258 438615 440439 555579 617310 625887 695430 734065 877230 880878 925965 1043145 1111158 1251774 1321317 1468130 1666737 1851930 1877661 2086290 2202195 2642634 2777895 2789447 3129435 3333474 3755322 3963951 4404390 5555790 5578894 6258870 6606585 7927902 8333685 8368341 9388305 11891853 13213170 13947235 16667370 16736682 18776610 19819755 23783706 25105023 27894470 35675559 39639510 41841705 50210046 52999493 59459265 71351118 75315069 83683410 105998986 118918530 125525115 150630138 158998479 178377795 225945207 251050230 264997465 317996958 356755590 376575345 451890414 476995437 529994930 677835621 753150690 794992395 953990874 1129726035 1355671242 1430986311 1589984790 2259452070 2384977185 2861972622 3389178105 4292958933 4769954370 6778356210 7154931555 8585917866 12878876799 14309863110 21464794665 25757753598 42929589330 64394383995 128788767990
• Sum of all divisors σ(n): 366589117440
• Sum of proper divisors (its aliquot sum) s(n): 237800349450
• 128788767990 is an abundant number, because the sum of its proper divisors (237800349450) is greater than itself. Its abundance is 109011581460

Bases of 128788767990

• Binary: 1110111111100011010001010010011110110₂
• Hexadecimal: 0x1DFC68A4F6
• Base-36: 1N5XI9DI

Squares and roots of 128788767990

• 128788767990 squared (128788767990²) is 16586546760382048640100
• 128788767990 cubed (128788767990³) is 2136160922478129786070733910399000
• The square root of 128788767990 is 358871.5201712167
• The cube root of 128788767990 is 5050.0149395369

Scales and comparisons

• 128,788,767,990 seconds is equal to 4,095 years, 4 weeks, 2 days, 17 hours, 46 minutes, 30 seconds.
• To count from 1 to 128,788,767,990 would take you about eight thousand, one hundred ninety 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 128788767990 cubic inches would be around 420.8 feet tall.

Recreational maths with 128788767990

• 128788767990 backwards is 099767887821
• The number of decimal digits it has is: 12
• The sum of 128788767990's digits is 72
• More coming soon!