21221928

Names of 21221928

• Cardinal: 21221928 can be written as Twenty-one million, two hundred twenty-one thousand, nine hundred twenty-eight.

Scientific notation

• Scientific notation: 2.1221928 × 10⁷

Factors of 21221928

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 145

Divisors of 21221928

• Number of divisors d(n): 192
• Complete list of divisors:
  1 2 3 4 6 7 8 9 12 13 14 18 21 24 26 28 36 39 41 42 52 56 63 72 78 79 82 84 91 104 117 123 126 156 158 164 168 182 234 237 246 252 273 287 312 316 328 364 369 468 474 492 504 533 546 553 574 632 711 728 738 819 861 936 948 984 1027 1066 1092 1106 1148 1422 1476 1599 1638 1659 1722 1896 2054 2132 2184 2212 2296 2583 2844 2952 3081 3198 3239 3276 3318 3444 3731 4108 4264 4424 4797 4977 5166 5688 6162 6396 6478 6552 6636 6888 7189 7462 8216 9243 9594 9717 9954 10332 11193 12324 12792 12956 13272 14378 14924 18486 19188 19434 19908 20664 21567 22386 22673 24648 25912 28756 29151 29848 33579 36972 38376 38868 39816 42107 43134 44772 45346 57512 58302 64701 67158 68019 73944 77736 84214 86268 89544 90692 116604 126321 129402 134316 136038 168428 172536 181384 204057 233208 252642 258804 268632 272076 294749 336856 378963 408114 505284 517608 544152 589498 757926 816228 884247 1010568 1178996 1515852 1632456 1768494 2357992 2652741 3031704 3536988 5305482 7073976 10610964 21221928
• Sum of all divisors σ(n): 73382400
• Sum of proper divisors (its aliquot sum) s(n): 52160472
• 21221928 is an abundant number, because the sum of its proper divisors (52160472) is greater than itself. Its abundance is 30938544

Bases of 21221928

• Binary: 1010000111101001000101000₂
• Hexadecimal: 0x143D228
• Base-36: CMUY0

Squares and roots of 21221928

• 21221928 squared (21221928²) is 450370228037184
• 21221928 cubed (21221928³) is 9557724552748700170752
• The square root of 21221928 is 4606.7263864919
• The cube root of 21221928 is 276.8608910223

Scales and comparisons

• 21,221,928 seconds is equal to 35 weeks, 14 hours, 58 minutes, 48 seconds.
• To count from 1 to 21,221,928 would take you about four 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 21221928 cubic inches would be around 23.1 feet tall.

Recreational maths with 21221928

• 21221928 backwards is 82912212
• The number of decimal digits it has is: 8
• The sum of 21221928's digits is 27
• More coming soon!