128238425721

Names of 128238425721

• Cardinal: 128238425721 can be written as One hundred twenty-eight billion, two hundred thirty-eight million, four hundred twenty-five thousand, seven hundred twenty-one.

Scientific notation

• Scientific notation: 1.28238425721 × 10¹¹

Factors of 128238425721

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 15
• Sum of prime factors: 121

Divisors of 128238425721

• Number of divisors d(n): 264
• Complete list of divisors:
  1 3 7 9 21 23 27 41 47 49 63 69 81 123 141 147 161 189 207 243 287 329 369 423 441 483 567 621 729 861 943 987 1081 1107 1127 1269 1323 1449 1701 1863 1927 2009 2187 2303 2583 2829 2961 3243 3321 3381 3807 3969 4347 5103 5589 5781 6027 6561 6601 6909 7567 7749 8487 8883 9729 9963 10143 11421 11907 13041 13489 15309 16767 17343 18081 19683 19803 20727 22701 23247 25461 26649 29187 29889 30429 34263 35721 39123 40467 44321 45927 46207 50301 52029 52969 54243 59049 59409 62181 68103 69741 76383 79947 87561 89667 91287 94423 102789 107163 117369 121401 132963 137781 138621 150903 156087 158907 162729 178227 186543 204309 209223 229149 239841 262683 269001 273861 283269 308367 310247 321489 352107 364203 398889 413343 415863 452709 468261 476721 488187 534681 559629 612927 627669 687447 719523 788049 807003 821583 849807 925101 930741 964467 1056321 1092609 1196667 1247589 1358127 1404783 1430163 1464561 1604043 1678887 1838781 1883007 2062341 2158569 2171729 2364147 2421009 2464749 2549421 2775303 2792223 2893401 3168963 3277827 3590001 3742767 4214349 4290489 4393683 4812129 5036661 5516343 5649021 6187023 6475707 6515187 7092441 7394247 7648263 8376669 9506889 9833481 10770003 11228301 12643047 12871467 13181049 14436387 15109983 16549029 16947063 18561069 19427121 19545561 21277323 22182741 22944789 25130007 29500443 32310009 33684903 37929141 38614401 39543147 43309161 45329949 49647087 55683207 58636683 63831969 66548223 68834367 75390021 88501329 96930027 101054709 113787423 115843203 118629441 129927483 135989847 148941261 175910049 206503101 226170063 265503987 290790081 303164127 347529609 389782449 446823783 527730147 619509303 678510189 796511961 872370243 909492381 1042588827 1583190441 1858527909 2035530567 2617110729 2728477143 3127766481 4749571323 5575583727 6106591701 14248713969 18319775103 42746141907 128238425721
• Sum of all divisors σ(n): 244274413824
• Sum of proper divisors (its aliquot sum) s(n): 116035988103
• 128238425721 is a deficient number, because the sum of its proper divisors (116035988103) is less than itself. Its deficiency is 12202437618

Bases of 128238425721

• Binary: 1110111011011100110110001011001111001₂
• Hexadecimal: 0x1DDB9B1679
• Base-36: 1MWTUIK9

Squares and roots of 128238425721

• 128238425721 squared (128238425721²) is 16445093831400434369841
• 128238425721 cubed (128238425721³) is 2108892943772919900343990521080361
• The square root of 128238425721 is 358103.9314514713
• The cube root of 128238425721 is 5042.8114002103

Scales and comparisons

• 128,238,425,721 seconds is equal to 4,077 years, 30 weeks, 3 days, 55 minutes, 21 seconds.
• To count from 1 to 128,238,425,721 would take you about eight thousand, one hundred fifty-five 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 128238425721 cubic inches would be around 420.2 feet tall.

Recreational maths with 128238425721

• 128238425721 backwards is 127524832821
• The number of decimal digits it has is: 12
• The sum of 128238425721's digits is 45
• More coming soon!