128999394465120

Names of 128999394465120

• Cardinal: 128999394465120 can be written as One hundred twenty-eight trillion, nine hundred ninety-nine billion, three hundred ninety-four million, four hundred sixty-five thousand, one hundred twenty.

Scientific notation

• Scientific notation: 1.2899939446512 × 10¹⁴

Factors of 128999394465120

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 29860970951

Divisors of 128999394465120

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 12 15 16 18 20 24 27 30 32 36 40 45 48 54 60 72 80 90 96 108 120 135 144 160 180 216 240 270 288 360 432 480 540 720 864 1080 1440 2160 4320 29860970941 59721941882 89582912823 119443883764 149304854705 179165825646 238887767528 268748738469 298609709410 358331651292 447914564115 477775535056 537497476938 597219418820 716663302584 806246215407 895829128230 955551070112 1074994953876 1194438837640 1343743692345 1433326605168 1612492430814 1791658256460 2149989907752 2388877675280 2687487384690 2866653210336 3224984861628 3583316512920 4031231077035 4299979815504 4777755350560 5374974769380 6449969723256 7166633025840 8062462154070 8599959631008 10749949538760 12899939446512 14333266051680 16124924308140 21499899077520 25799878893024 32249848616280 42999798155040 64499697232560 128999394465120
• Sum of all divisors σ(n): 451497880643040
• Sum of proper divisors (its aliquot sum) s(n): 322498486177920
• 128999394465120 is an abundant number, because the sum of its proper divisors (322498486177920) is greater than itself. Its abundance is 193499091712800

Bases of 128999394465120

• Binary: 11101010101001100000011000101010101010101100000₂
• Hexadecimal: 0x755303155560
• Base-36: 19Q5I4SRC0

Squares and roots of 128999394465120

• 128999394465120 squared (128999394465120²) is 16640843772367632490896614400
• 128999394465120 cubed (128999394465120³) is 2146658770024087791944006998417506889728000
• The square root of 128999394465120 is 11357790.0343825691
• The cube root of 128999394465120 is 50527.6644117265

Scales and comparisons

• 128,999,394,465,120 seconds is equal to 4,101,781 years, 37 weeks, 4 days, 1 hour, 12 minutes.
• To count from 1 to 128,999,394,465,120 would take you about ten million, two hundred fifty-four thousand, four hundred fifty-four 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 128999394465120 cubic inches would be around 4210.6 feet tall.

Recreational maths with 128999394465120

• 128999394465120 backwards is 021564493999821
• 128999394465120 is a Harshad number.
• The number of decimal digits it has is: 15
• The sum of 128999394465120's digits is 72
• More coming soon!