21228240

Names of 21228240

• Cardinal: 21228240 can be written as Twenty-one million, two hundred twenty-eight thousand, two hundred forty.

Scientific notation

• Scientific notation: 2.122824 × 10⁷

Factors of 21228240

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 81

Divisors of 21228240

• Number of divisors d(n): 240
• Complete list of divisors:
  1 2 3 4 5 6 8 10 11 12 15 16 17 20 22 24 30 33 34 40 43 44 48 51 55 60 66 68 80 85 86 88 102 110 120 121 129 132 136 165 170 172 176 187 204 215 220 240 242 255 258 264 272 330 340 344 363 374 408 430 440 473 484 510 516 528 561 605 645 660 680 688 726 731 748 816 860 880 935 946 968 1020 1032 1122 1210 1290 1320 1360 1419 1452 1462 1496 1720 1815 1870 1892 1936 2040 2057 2064 2193 2244 2365 2420 2580 2640 2805 2838 2904 2924 2992 3440 3630 3655 3740 3784 4080 4114 4386 4488 4730 4840 5160 5203 5610 5676 5808 5848 6171 7095 7260 7310 7480 7568 8041 8228 8772 8976 9460 9680 10285 10320 10406 10965 11220 11352 11696 12342 14190 14520 14620 14960 15609 16082 16456 17544 18920 20570 20812 21930 22440 22704 24123 24684 26015 28380 29040 29240 30855 31218 32164 32912 35088 37840 40205 41140 41624 43860 44880 48246 49368 52030 56760 58480 61710 62436 64328 78045 80410 82280 83248 87720 88451 96492 98736 104060 113520 120615 123420 124872 128656 156090 160820 164560 175440 176902 192984 208120 241230 246840 249744 265353 312180 321640 353804 385968 416240 442255 482460 493680 530706 624360 643280 707608 884510 964920 1061412 1248720 1326765 1415216 1769020 1929840 2122824 2653530 3538040 4245648 5307060 7076080 10614120 21228240
• Sum of all divisors σ(n): 78369984
• Sum of proper divisors (its aliquot sum) s(n): 57141744
• 21228240 is an abundant number, because the sum of its proper divisors (57141744) is greater than itself. Its abundance is 35913504

Bases of 21228240

• Binary: 1010000111110101011010000₂
• Hexadecimal: 0x143EAD0
• Base-36: CMZTC

Squares and roots of 21228240

• 21228240 squared (21228240²) is 450638173497600
• 21228240 cubed (21228240³) is 9566255300168692224000
• The square root of 21228240 is 4607.4114207437
• The cube root of 21228240 is 276.8883370475

Scales and comparisons

• 21,228,240 seconds is equal to 35 weeks, 16 hours, 44 minutes.
• To count from 1 to 21,228,240 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 21228240 cubic inches would be around 23.1 feet tall.

Recreational maths with 21228240

• 21228240 backwards is 04282212
• The number of decimal digits it has is: 8
• The sum of 21228240's digits is 21
• More coming soon!