128421199872

Names of 128421199872

• Cardinal: 128421199872 can be written as One hundred twenty-eight billion, four hundred twenty-one million, one hundred ninety-nine thousand, eight hundred seventy-two.

Scientific notation

• Scientific notation: 1.28421199872 × 10¹¹

Factors of 128421199872

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 31
• Sum of prime factors: 12

Divisors of 128421199872

• Number of divisors d(n): 384
• Complete list of divisors:
  1 2 3 4 6 7 8 9 12 14 16 18 21 24 27 28 32 36 42 48 54 56 63 64 72 81 84 96 108 112 126 128 144 162 168 189 192 216 224 243 252 256 288 324 336 378 384 432 448 486 504 512 567 576 648 672 729 756 768 864 896 972 1008 1024 1134 1152 1296 1344 1458 1512 1536 1701 1728 1792 1944 2016 2048 2187 2268 2304 2592 2688 2916 3024 3072 3402 3456 3584 3888 4032 4096 4374 4536 4608 5103 5184 5376 5832 6048 6144 6804 6912 7168 7776 8064 8192 8748 9072 9216 10206 10368 10752 11664 12096 12288 13608 13824 14336 15309 15552 16128 16384 17496 18144 18432 20412 20736 21504 23328 24192 24576 27216 27648 28672 30618 31104 32256 32768 34992 36288 36864 40824 41472 43008 46656 48384 49152 54432 55296 57344 61236 62208 64512 65536 69984 72576 73728 81648 82944 86016 93312 96768 98304 108864 110592 114688 122472 124416 129024 131072 139968 145152 147456 163296 165888 172032 186624 193536 196608 217728 221184 229376 244944 248832 258048 262144 279936 290304 294912 326592 331776 344064 373248 387072 393216 435456 442368 458752 489888 497664 516096 524288 559872 580608 589824 653184 663552 688128 746496 774144 786432 870912 884736 917504 979776 995328 1032192 1048576 1119744 1161216 1179648 1306368 1327104 1376256 1492992 1548288 1572864 1741824 1769472 1835008 1959552 1990656 2064384 2097152 2239488 2322432 2359296 2612736 2654208 2752512 2985984 3096576 3145728 3483648 3538944 3670016 3919104 3981312 4128768 4194304 4478976 4644864 4718592 5225472 5308416 5505024 5971968 6193152 6291456 6967296 7077888 7340032 7838208 7962624 8257536 8388608 8957952 9289728 9437184 10450944 10616832 11010048 11943936 12386304 12582912 13934592 14155776 14680064 15676416 15925248 16515072 17915904 18579456 18874368 20901888 21233664 22020096 23887872 24772608 25165824 27869184 28311552 29360128 31352832 31850496 33030144 35831808 37158912 37748736 41803776 42467328 44040192 47775744 49545216 55738368 56623104 58720256 62705664 63700992 66060288 71663616 74317824 75497472 83607552 84934656 88080384 95551488 99090432 111476736 113246208 125411328 127401984 132120576 143327232 148635648 167215104 169869312 176160768 191102976 198180864 222953472 226492416 250822656 254803968 264241152 286654464 297271296 334430208 339738624 382205952 396361728 445906944 501645312 509607936 528482304 573308928 594542592 668860416 679477248 764411904 792723456 891813888 1003290624 1019215872 1146617856 1189085184 1337720832 1528823808 1585446912 1783627776 2006581248 2038431744 2293235712 2378170368 2675441664 3057647616 3567255552 4013162496 4586471424 4756340736 5350883328 6115295232 7134511104 8026324992 9172942848 10701766656 14269022208 16052649984 18345885696 21403533312 32105299968 42807066624 64210599936 128421199872
• Sum of all divisors σ(n): 440234121600
• Sum of proper divisors (its aliquot sum) s(n): 311812921728
• 128421199872 is an abundant number, because the sum of its proper divisors (311812921728) is greater than itself. Its abundance is 183391721856

Bases of 128421199872

• Binary: 1110111100110100000000000000000000000₂
• Hexadecimal: 0x1DE6800000
• Base-36: 1MZUO000

Squares and roots of 128421199872

• 128421199872 squared (128421199872²) is 16492004576564172816384
• 128421199872 cubed (128421199872³) is 2117923016016886364287198820302848
• The square root of 128421199872 is 358359.0376591609
• The cube root of 128421199872 is 5045.2060491509

Scales and comparisons

• 128,421,199,872 seconds is equal to 4,083 years, 20 weeks, 4 days, 11 hours, 31 minutes, 12 seconds.
• To count from 1 to 128,421,199,872 would take you about eight thousand, one hundred sixty-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 128421199872 cubic inches would be around 420.4 feet tall.

Recreational maths with 128421199872

• 128421199872 backwards is 278991124821
• 128421199872 is a Harshad number.
• The number of decimal digits it has is: 12
• The sum of 128421199872's digits is 54
• More coming soon!