28209870

Names of 28209870

• Cardinal: 28209870 can be written as Twenty-eight million, two hundred nine thousand, eight hundred seventy.

Scientific notation

• Scientific notation: 2.820987 × 10⁷

Factors of 28209870

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 89

Divisors of 28209870

• Number of divisors d(n): 192
• Complete list of divisors:
  1 2 3 5 6 9 10 13 15 18 19 26 27 30 38 39 45 47 54 57 65 78 81 90 94 95 114 117 130 135 141 162 171 190 195 234 235 243 247 270 282 285 342 351 390 405 423 470 486 494 513 570 585 611 702 705 741 810 846 855 893 1026 1053 1170 1215 1222 1235 1269 1410 1482 1539 1710 1755 1786 1833 2106 2115 2223 2430 2470 2538 2565 2679 3055 3078 3159 3510 3666 3705 3807 4230 4446 4465 4617 5130 5265 5358 5499 6110 6318 6345 6669 7410 7614 7695 8037 8930 9165 9234 10530 10998 11115 11421 11609 12690 13338 13395 15390 15795 16074 16497 18330 19035 20007 22230 22842 23085 23218 24111 26790 27495 31590 32994 33345 34827 38070 40014 40185 46170 48222 49491 54990 57105 58045 60021 66690 69654 72333 80370 82485 98982 100035 104481 114210 116090 120042 120555 144666 148473 164970 174135 200070 208962 216999 241110 247455 296946 300105 313443 348270 361665 433998 494910 522405 600210 626886 723330 742365 940329 1044810 1084995 1484730 1567215 1880658 2169990 2820987 3134430 4701645 5641974 9403290 14104935 28209870
• Sum of all divisors σ(n): 88058880
• Sum of proper divisors (its aliquot sum) s(n): 59849010
• 28209870 is an abundant number, because the sum of its proper divisors (59849010) is greater than itself. Its abundance is 31639140

Bases of 28209870

• Binary: 1101011100111001011001110₂
• Hexadecimal: 0x1AE72CE
• Base-36: GSMVI

Squares and roots of 28209870

• 28209870 squared (28209870²) is 795796765416900
• 28209870 cubed (28209870³) is 22449323298831244803000
• The square root of 28209870 is 5311.2964519033
• The cube root of 28209870 is 304.4156868171

Scales and comparisons

• 28,209,870 seconds is equal to 46 weeks, 4 days, 12 hours, 4 minutes, 30 seconds.
• To count from 1 to 28,209,870 would take you about seventeen 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 28209870 cubic inches would be around 25.4 feet tall.

Recreational maths with 28209870

• 28209870 backwards is 07890282
• The number of decimal digits it has is: 8
• The sum of 28209870's digits is 36
• More coming soon!