28021332729

Names of 28021332729

• Cardinal: 28021332729 can be written as Twenty-eight billion, twenty-one million, three hundred thirty-two thousand, seven hundred twenty-nine.

Scientific notation

• Scientific notation: 2.8021332729 × 10¹⁰

Factors of 28021332729

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 8738

Divisors of 28021332729

• Number of divisors d(n): 64
• Complete list of divisors:
  1 3 13 31 37 39 73 93 111 219 403 481 949 1147 1209 1443 2263 2701 2847 3441 6789 8103 8581 14911 25743 29419 35113 44733 83731 88257 105339 111553 251193 266011 317497 334659 626413 798033 952491 1088503 1879239 3265509 3458143 4127461 8143369 9842407 10374429 12382383 19418803 23177281 24430107 29527221 58256409 69531843 127951291 252444439 301304653 383853873 718495711 757333317 903913959 2155487133 9340444243 28021332729
• Sum of all divisors σ(n): 43245590528
• Sum of proper divisors (its aliquot sum) s(n): 15224257799
• 28021332729 is a deficient number, because the sum of its proper divisors (15224257799) is less than itself. Its deficiency is 12797074930

Bases of 28021332729

• Binary: 11010000110001100111001101011111001₂
• Hexadecimal: 0x686339AF9
• Base-36: CVF6EPL

Squares and roots of 28021332729

• 28021332729 squared (28021332729²) is 785195087909326587441
• 28021332729 cubed (28021332729³) is 22002212815483645289010373656489
• The square root of 28021332729 is 167395.7368901609
• The cube root of 28021332729 is 3037.3599514627

Scales and comparisons

• 28,021,332,729 seconds is equal to 890 years, 51 weeks, 3 days, 23 hours, 32 minutes, 9 seconds.
• To count from 1 to 28,021,332,729 would take you about one thousand, seven hundred eighty-one 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 28021332729 cubic inches would be around 253.1 feet tall.

Recreational maths with 28021332729

• 28021332729 backwards is 92723312082
• 28021332729 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 28021332729's digits is 39
• More coming soon!