21127428

Names of 21127428

• Cardinal: 21127428 can be written as Twenty-one million, one hundred twenty-seven thousand, four hundred twenty-eight.

Scientific notation

• Scientific notation: 2.1127428 × 10⁷

Factors of 21127428

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 100

Divisors of 21127428

• Number of divisors d(n): 144
• Complete list of divisors:
  1 2 3 4 6 7 9 12 14 18 21 28 29 36 42 49 58 59 63 84 87 98 116 118 126 147 174 177 196 203 236 252 261 294 343 348 354 406 413 441 522 531 588 609 686 708 812 826 882 1029 1044 1062 1218 1239 1372 1421 1652 1711 1764 1827 2058 2124 2436 2478 2842 2891 3087 3422 3654 3717 4116 4263 4956 5133 5684 5782 6174 6844 7308 7434 8526 8673 9947 10266 11564 11977 12348 12789 14868 15399 17052 17346 19894 20237 20532 23954 25578 26019 29841 30798 34692 35931 39788 40474 47908 51156 52038 59682 60711 61596 71862 80948 83839 89523 104076 107793 119364 121422 143724 167678 179046 182133 215586 242844 251517 335356 358092 364266 431172 503034 586873 728532 754551 1006068 1173746 1509102 1760619 2347492 3018204 3521238 5281857 7042476 10563714 21127428
• Sum of all divisors σ(n): 65520000
• Sum of proper divisors (its aliquot sum) s(n): 44392572
• 21127428 is an abundant number, because the sum of its proper divisors (44392572) is greater than itself. Its abundance is 23265144

Bases of 21127428

• Binary: 1010000100110000100000100₂
• Hexadecimal: 0x1426104
• Base-36: CKU10

Squares and roots of 21127428

• 21127428 squared (21127428²) is 446368213895184
• 21127428 cubed (21127428³) is 9430612300559099506752
• The square root of 21127428 is 4596.4582017027
• The cube root of 21127428 is 276.4493310989

Scales and comparisons

• 21,127,428 seconds is equal to 34 weeks, 6 days, 12 hours, 43 minutes, 48 seconds.
• To count from 1 to 21,127,428 would take you about two days!

  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 21127428 cubic inches would be around 23 feet tall.

Recreational maths with 21127428

• 21127428 backwards is 82472112
• The number of decimal digits it has is: 8
• The sum of 21127428's digits is 27
• More coming soon!