128128

Names of 128128

• Cardinal: 128128 can be written as One hundred twenty-eight thousand, one hundred twenty-eight.

Scientific notation

• Scientific notation: 1.28128 × 10⁵

Factors of 128128

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 33

Divisors of 128128

• Number of divisors d(n): 64
• Complete list of divisors:
  1 2 4 7 8 11 13 14 16 22 26 28 32 44 52 56 64 77 88 91 104 112 128 143 154 176 182 208 224 286 308 352 364 416 448 572 616 704 728 832 896 1001 1144 1232 1408 1456 1664 2002 2288 2464 2912 4004 4576 4928 5824 8008 9152 9856 11648 16016 18304 32032 64064 128128
• Sum of all divisors σ(n): 342720
• Sum of proper divisors (its aliquot sum) s(n): 214592
• 128128 is an abundant number, because the sum of its proper divisors (214592) is greater than itself. Its abundance is 86464

Bases of 128128

• Binary: 11111010010000000₂
• Hexadecimal: 0x1F480
• Base-36: 2QV4

Squares and roots of 128128

• 128128 squared (128128²) is 16416784384
• 128128 cubed (128128³) is 2103449749553152
• The square root of 128128 is 357.9497171391
• The cube root of 128128 is 50.4136353465

Scales and comparisons

• 128,128 seconds is equal to 1 day, 11 hours, 35 minutes, 28 seconds.
• To count from 1 to 128,128 would take you about eleven hours.

  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 128128 cubic inches would be around 4.2 feet tall.

Recreational maths with 128128

• 128128 backwards is 821821
• 128128 is a Harshad number.
• The number of decimal digits it has is: 6
• The sum of 128128's digits is 22
• More coming soon!