128801442

Names of 128801442

• Cardinal: 128801442 can be written as One hundred twenty-eight million, eight hundred one thousand, four hundred forty-two.

Scientific notation

• Scientific notation: 1.28801442 × 10⁸

Factors of 128801442

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 3631

Divisors of 128801442

• Number of divisors d(n): 64
• Complete list of divisors:
  1 2 3 6 7 11 14 21 22 33 42 66 77 79 154 158 231 237 462 474 553 869 1106 1659 1738 2607 3318 3529 5214 6083 7058 10587 12166 18249 21174 24703 36498 38819 49406 74109 77638 116457 148218 232914 271733 278791 543466 557582 815199 836373 1630398 1672746 1951537 3066701 3903074 5854611 6133402 9200103 11709222 18400206 21466907 42933814 64400721 128801442
• Sum of all divisors σ(n): 325324800
• Sum of proper divisors (its aliquot sum) s(n): 196523358
• 128801442 is an abundant number, because the sum of its proper divisors (196523358) is greater than itself. Its abundance is 67721916

Bases of 128801442

• Binary: 111101011010101101010100010₂
• Hexadecimal: 0x7AD5AA2
• Base-36: 24ONTU

Squares and roots of 128801442

• 128801442 squared (128801442²) is 16589811461279364
• 128801442 cubed (128801442³) is 2136791638720909248042888
• The square root of 128801442 is 11349.0722968885
• The cube root of 128801442 is 505.0180590215

Scales and comparisons

• 128,801,442 seconds is equal to 4 years, 4 weeks, 6 days, 18 hours, 10 minutes, 42 seconds.
• To count from 1 to 128,801,442 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 128801442 cubic inches would be around 42.1 feet tall.

Recreational maths with 128801442

• 128801442 backwards is 244108821
• The number of decimal digits it has is: 9
• The sum of 128801442's digits is 30
• More coming soon!