21428302

Names of 21428302

• Cardinal: 21428302 can be written as Twenty-one million, four hundred twenty-eight thousand, three hundred two.

Scientific notation

• Scientific notation: 2.1428302 × 10⁷

Factors of 21428302

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 4
• Sum of prime factors: 9915

Divisors of 21428302

• Number of divisors d(n): 16
• Complete list of divisors:
  1 2 7 14 157 314 1099 2198 9749 19498 68243 136486 1530593 3061186 10714151 21428302
• Sum of all divisors σ(n): 36972000
• Sum of proper divisors (its aliquot sum) s(n): 15543698
• 21428302 is a deficient number, because the sum of its proper divisors (15543698) is less than itself. Its deficiency is 5884604

Bases of 21428302

• Binary: 1010001101111100001001110₂
• Hexadecimal: 0x146F84E
• Base-36: CRA6M

Squares and roots of 21428302

• 21428302 squared (21428302²) is 459172126603204
• 21428302 cubed (21428302³) is 9839278998835689479608
• The square root of 21428302 is 4629.0713971595
• The cube root of 21428302 is 277.7554480303

Scales and comparisons

• 21,428,302 seconds is equal to 35 weeks, 3 days, 18 minutes, 22 seconds.
• To count from 1 to 21,428,302 would take you about twenty-seven 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 21428302 cubic inches would be around 23.1 feet tall.

Recreational maths with 21428302

• 21428302 backwards is 20382412
• The number of decimal digits it has is: 8
• The sum of 21428302's digits is 22
• More coming soon!