21921228

Names of 21921228

• Cardinal: 21921228 can be written as Twenty-one million, nine hundred twenty-one thousand, two hundred twenty-eight.

Scientific notation

• Scientific notation: 2.1921228 × 10⁷

Factors of 21921228

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 72

Divisors of 21921228

• Number of divisors d(n): 162
• Complete list of divisors:
  1 2 3 4 6 7 9 12 14 17 18 21 28 34 36 42 43 49 51 63 68 84 86 98 102 119 126 129 147 153 172 196 204 238 252 258 289 294 301 306 357 387 441 476 516 578 588 602 612 714 731 774 833 867 882 903 1071 1156 1204 1428 1462 1548 1666 1734 1764 1806 2023 2107 2142 2193 2499 2601 2709 2924 3332 3468 3612 4046 4214 4284 4386 4998 5117 5202 5418 6069 6321 6579 7497 8092 8428 8772 9996 10234 10404 10836 12138 12427 12642 13158 14161 14994 15351 18207 18963 20468 24276 24854 25284 26316 28322 29988 30702 35819 36414 37281 37926 42483 46053 49708 56644 61404 71638 72828 74562 75852 84966 86989 92106 107457 111843 127449 143276 149124 169932 173978 184212 214914 223686 254898 260967 322371 347956 429828 447372 509796 521934 608923 644742 782901 1043868 1217846 1289484 1565802 1826769 2435692 3131604 3653538 5480307 7307076 10960614 21921228
• Sum of all divisors σ(n): 70065996
• Sum of proper divisors (its aliquot sum) s(n): 48144768
• 21921228 is an abundant number, because the sum of its proper divisors (48144768) is greater than itself. Its abundance is 26223540

Bases of 21921228

• Binary: 1010011100111110111001100₂
• Hexadecimal: 0x14E7DCC
• Base-36: D1UJ0

Squares and roots of 21921228

• 21921228 squared (21921228²) is 480540237027984
• 21921228 cubed (21921228³) is 10534032099064479644352
• The square root of 21921228 is 4682.0111063517
• The cube root of 21921228 is 279.8691054855

Scales and comparisons

• 21,921,228 seconds is equal to 36 weeks, 1 day, 17 hours, 13 minutes, 48 seconds.
• To count from 1 to 21,921,228 would take you about two weeks!

  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 21921228 cubic inches would be around 23.3 feet tall.

Recreational maths with 21921228

• 21921228 backwards is 82212912
• The number of decimal digits it has is: 8
• The sum of 21921228's digits is 27
• More coming soon!