21868308

Names of 21868308

• Cardinal: 21868308 can be written as Twenty-one million, eight hundred sixty-eight thousand, three hundred eight.

Scientific notation

• Scientific notation: 2.1868308 × 10⁷

Factors of 21868308

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 46

Divisors of 21868308

• Number of divisors d(n): 180
• Complete list of divisors:
  1 2 3 4 6 7 9 11 12 14 18 21 22 23 28 33 36 42 44 46 49 63 66 69 77 84 92 98 99 126 132 138 147 154 161 196 198 207 231 252 253 276 294 308 322 343 396 414 441 462 483 506 539 588 644 686 693 759 828 882 924 966 1012 1029 1078 1127 1372 1386 1449 1518 1617 1764 1771 1932 2058 2156 2254 2277 2401 2772 2898 3036 3087 3234 3381 3542 3773 4116 4508 4554 4802 4851 5313 5796 6174 6468 6762 7084 7203 7546 7889 9108 9604 9702 10143 10626 11319 12348 12397 13524 14406 15092 15778 15939 19404 20286 21252 21609 22638 23667 24794 26411 28812 31556 31878 33957 37191 40572 43218 45276 47334 49588 52822 55223 63756 67914 71001 74382 79233 86436 86779 94668 105644 110446 111573 135828 142002 148764 158466 165669 173558 220892 223146 237699 260337 284004 316932 331338 347116 446292 475398 497007 520674 607453 662676 781011 950796 994014 1041348 1214906 1562022 1822359 1988028 2429812 3124044 3644718 5467077 7289436 10934154 21868308
• Sum of all divisors σ(n): 73408608
• Sum of proper divisors (its aliquot sum) s(n): 51540300
• 21868308 is an abundant number, because the sum of its proper divisors (51540300) is greater than itself. Its abundance is 29671992

Bases of 21868308

• Binary: 1010011011010111100010100₂
• Hexadecimal: 0x14DAF14
• Base-36: D0PP0

Squares and roots of 21868308

• 21868308 squared (21868308²) is 478222894782864
• 21868308 cubed (21868308³) is 10457925555763263074112
• The square root of 21868308 is 4676.3562738527
• The cube root of 21868308 is 279.6437135015

Scales and comparisons

• 21,868,308 seconds is equal to 36 weeks, 1 day, 2 hours, 31 minutes, 48 seconds.
• To count from 1 to 21,868,308 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 21868308 cubic inches would be around 23.3 feet tall.

Recreational maths with 21868308

• 21868308 backwards is 80386812
• 21868308 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 21868308's digits is 36
• More coming soon!