21428033

Names of 21428033

• Cardinal: 21428033 can be written as Twenty-one million, four hundred twenty-eight thousand and thirty-three.

Scientific notation

• Scientific notation: 2.1428033 × 10⁷

Factors of 21428033

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 4
• Sum of prime factors: 448

Divisors of 21428033

• Number of divisors d(n): 16
• Complete list of divisors:
  1 11 59 137 241 649 1507 2651 8083 14219 33017 88913 156409 363187 1948003 21428033
• Sum of all divisors σ(n): 24045120
• Sum of proper divisors (its aliquot sum) s(n): 2617087
• 21428033 is a deficient number, because the sum of its proper divisors (2617087) is less than itself. Its deficiency is 18810946

Bases of 21428033

• Binary: 1010001101111011101000001₂
• Hexadecimal: 0x146F741
• Base-36: CR9Z5

Squares and roots of 21428033

• 21428033 squared (21428033²) is 459160598249089
• 21428033 cubed (21428033³) is 9838908451581221311937
• The square root of 21428033 is 4629.0423415649
• The cube root of 21428033 is 277.7542857583

Scales and comparisons

• 21,428,033 seconds is equal to 35 weeks, 3 days, 13 minutes, 53 seconds.
• To count from 1 to 21,428,033 would take you about twenty minutes!

  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 21428033 cubic inches would be around 23.1 feet tall.

Recreational maths with 21428033

• 21428033 backwards is 33082412
• The number of decimal digits it has is: 8
• The sum of 21428033's digits is 23
• More coming soon!