128121750

Names of 128121750

• Cardinal: 128121750 can be written as One hundred twenty-eight million, one hundred twenty-one thousand, seven hundred fifty.

Scientific notation

• Scientific notation: 1.2812175 × 10⁸

Factors of 128121750

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 66

Divisors of 128121750

• Number of divisors d(n): 224
• Complete list of divisors:
  1 2 3 5 6 9 10 15 18 19 25 27 30 37 38 45 50 54 57 74 75 81 90 95 111 114 125 135 150 162 171 185 190 222 225 243 250 270 285 333 342 370 375 405 450 475 486 513 555 570 666 675 703 729 750 810 855 925 950 999 1026 1110 1125 1215 1350 1406 1425 1458 1539 1665 1710 1850 1998 2025 2109 2250 2375 2430 2565 2775 2850 2997 3078 3330 3375 3515 3645 4050 4218 4275 4617 4625 4750 4995 5130 5550 5994 6075 6327 6750 7030 7125 7290 7695 8325 8550 8991 9234 9250 9990 10125 10545 12150 12654 12825 13851 13875 14250 14985 15390 16650 17575 17982 18225 18981 20250 21090 21375 23085 24975 25650 26973 27702 27750 29970 30375 31635 35150 36450 37962 38475 41625 42750 44955 46170 49950 52725 53946 56943 60750 63270 64125 69255 74925 76950 83250 87875 89910 91125 94905 105450 113886 115425 124875 128250 134865 138510 149850 158175 170829 175750 182250 189810 192375 224775 230850 249750 263625 269730 284715 316350 341658 346275 374625 384750 449550 474525 512487 527250 569430 577125 674325 692550 749250 790875 854145 949050 1024974 1123875 1154250 1348650 1423575 1581750 1708290 1731375 2247750 2372625 2562435 2847150 3371625 3462750 4270725 4745250 5124870 6743250 7117875 8541450 12812175 14235750 21353625 25624350 42707250 64060875 128121750
• Sum of all divisors σ(n): 388758240
• Sum of proper divisors (its aliquot sum) s(n): 260636490
• 128121750 is an abundant number, because the sum of its proper divisors (260636490) is greater than itself. Its abundance is 132514740

Bases of 128121750

• Binary: 111101000101111101110010110₂
• Hexadecimal: 0x7A2FB96
• Base-36: 24A3DI

Squares and roots of 128121750

• 128121750 squared (128121750²) is 16415182823062500
• 128121750 cubed (128121750³) is 2103141949860707859375000
• The square root of 128121750 is 11319.0878607775
• The cube root of 128121750 is 504.1281561855

Scales and comparisons

• 128,121,750 seconds is equal to 4 years, 3 weeks, 5 days, 21 hours, 22 minutes, 30 seconds.
• To count from 1 to 128,121,750 would take you about 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 128121750 cubic inches would be around 42 feet tall.

Recreational maths with 128121750

• 128121750 backwards is 057121821
• 128121750 is a Harshad number.
• The number of decimal digits it has is: 9
• The sum of 128121750's digits is 27
• More coming soon!