81328128

Names of 81328128

• Cardinal: 81328128 can be written as Eighty-one million, three hundred twenty-eight thousand, one hundred twenty-eight.

Scientific notation

• Scientific notation: 8.1328128 × 10⁷

Factors of 81328128

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 15
• Sum of prime factors: 104

Divisors of 81328128

• Number of divisors d(n): 192
• Complete list of divisors:
  1 2 3 4 6 7 8 12 14 16 21 24 28 31 32 42 48 56 61 62 64 84 93 96 112 122 124 128 168 183 186 192 217 224 244 248 256 336 366 372 384 427 434 448 488 496 512 651 672 732 744 768 854 868 896 976 992 1024 1281 1302 1344 1464 1488 1536 1708 1736 1792 1891 1952 1984 2048 2562 2604 2688 2928 2976 3072 3416 3472 3584 3782 3904 3968 5124 5208 5376 5673 5856 5952 6144 6832 6944 7168 7564 7808 7936 10248 10416 10752 11346 11712 11904 13237 13664 13888 14336 15128 15616 15872 20496 20832 21504 22692 23424 23808 26474 27328 27776 30256 31232 31744 39711 40992 41664 43008 45384 46848 47616 52948 54656 55552 60512 62464 63488 79422 81984 83328 90768 93696 95232 105896 109312 111104 121024 124928 158844 163968 166656 181536 187392 190464 211792 218624 222208 242048 317688 327936 333312 363072 374784 423584 437248 444416 484096 635376 655872 666624 726144 847168 874496 968192 1270752 1311744 1333248 1452288 1694336 1936384 2541504 2623488 2904576 3388672 3872768 5083008 5809152 6777344 10166016 11618304 13554688 20332032 27109376 40664064 81328128
• Sum of all divisors σ(n): 259983360
• Sum of proper divisors (its aliquot sum) s(n): 178655232
• 81328128 is an abundant number, because the sum of its proper divisors (178655232) is greater than itself. Its abundance is 97327104

Bases of 81328128

• Binary: 100110110001111100000000000₂
• Hexadecimal: 0x4D8F800
• Base-36: 1CF56O

Squares and roots of 81328128

• 81328128 squared (81328128²) is 6614264403984384
• 81328128 cubed (81328128³) is 537925742073085691953152
• The square root of 81328128 is 9018.2109090439
• The cube root of 81328128 is 433.2583338973

Scales and comparisons

• 81,328,128 seconds is equal to 2 years, 30 weeks, 3 days, 7 hours, 8 minutes, 48 seconds.
• To count from 1 to 81,328,128 would take you about three 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 81328128 cubic inches would be around 36.1 feet tall.

Recreational maths with 81328128

• 81328128 backwards is 82182318
• The number of decimal digits it has is: 8
• The sum of 81328128's digits is 33
• More coming soon!