21308040

Names of 21308040

• Cardinal: 21308040 can be written as Twenty-one million, three hundred eight thousand and forty.

Scientific notation

• Scientific notation: 2.130804 × 10⁷

Factors of 21308040

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 209

Divisors of 21308040

• Number of divisors d(n): 192
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 12 13 15 18 20 24 26 29 30 36 39 40 45 52 58 60 65 72 78 87 90 104 116 117 120 130 145 156 157 174 180 195 232 234 260 261 290 312 314 348 360 377 390 435 468 471 520 522 580 585 628 696 754 780 785 870 936 942 1044 1131 1160 1170 1256 1305 1413 1508 1560 1570 1740 1884 1885 2041 2088 2262 2340 2355 2610 2826 3016 3140 3393 3480 3768 3770 4082 4524 4553 4680 4710 5220 5652 5655 6123 6280 6786 7065 7540 8164 9048 9106 9420 10205 10440 11304 11310 12246 13572 13659 14130 15080 16328 16965 18212 18369 18840 20410 22620 22765 24492 27144 27318 28260 30615 33930 36424 36738 40820 40977 45240 45530 48984 54636 56520 59189 61230 67860 68295 73476 81640 81954 91060 91845 109272 118378 122460 135720 136590 146952 163908 177567 182120 183690 204885 236756 244920 273180 295945 327816 355134 367380 409770 473512 532701 546360 591890 710268 734760 819540 887835 1065402 1183780 1420536 1639080 1775670 2130804 2367560 2663505 3551340 4261608 5327010 7102680 10654020 21308040
• Sum of all divisors σ(n): 77641200
• Sum of proper divisors (its aliquot sum) s(n): 56333160
• 21308040 is an abundant number, because the sum of its proper divisors (56333160) is greater than itself. Its abundance is 35025120

Bases of 21308040

• Binary: 1010001010010001010001000₂
• Hexadecimal: 0x1452288
• Base-36: COPE0

Squares and roots of 21308040

• 21308040 squared (21308040²) is 454032568641600
• 21308040 cubed (21308040³) is 9674544133917958464000
• The square root of 21308040 is 4616.0632577989
• The cube root of 21308040 is 277.2348575319

Scales and comparisons

• 21,308,040 seconds is equal to 35 weeks, 1 day, 14 hours, 54 minutes.
• To count from 1 to 21,308,040 would take you about five 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 21308040 cubic inches would be around 23.1 feet tall.

Recreational maths with 21308040

• 21308040 backwards is 04080312
• 21308040 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 21308040's digits is 18
• More coming soon!