21428484

Names of 21428484

• Cardinal: 21428484 can be written as Twenty-one million, four hundred twenty-eight thousand, four hundred eighty-four.

Scientific notation

• Scientific notation: 2.1428484 × 10⁷

Factors of 21428484

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 3336

Divisors of 21428484

• Number of divisors d(n): 72
• Complete list of divisors:
  1 2 3 4 6 7 11 12 14 21 22 28 33 42 44 49 66 77 84 98 132 147 154 196 231 294 308 462 539 588 924 1078 1617 2156 3234 3313 6468 6626 9939 13252 19878 23191 36443 39756 46382 69573 72886 92764 109329 139146 145772 162337 218658 255101 278292 324674 437316 487011 510202 649348 765303 974022 1020404 1530606 1785707 1948044 3061212 3571414 5357121 7142828 10714242 21428484
• Sum of all divisors σ(n): 63469728
• Sum of proper divisors (its aliquot sum) s(n): 42041244
• 21428484 is an abundant number, because the sum of its proper divisors (42041244) is greater than itself. Its abundance is 20612760

Bases of 21428484

• Binary: 1010001101111100100000100₂
• Hexadecimal: 0x146F904
• Base-36: CRABO

Squares and roots of 21428484

• 21428484 squared (21428484²) is 459179926538256
• 21428484 cubed (21428484³) is 9839529708946194083904
• The square root of 21428484 is 4629.0910554881
• The cube root of 21428484 is 277.7562343945

Scales and comparisons

• 21,428,484 seconds is equal to 35 weeks, 3 days, 21 minutes, 24 seconds.
• To count from 1 to 21,428,484 would take you about thirty-two 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 21428484 cubic inches would be around 23.1 feet tall.

Recreational maths with 21428484

• 21428484 backwards is 48482412
• 21428484 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 21428484's digits is 33
• More coming soon!