28720560

Names of 28720560

• Cardinal: 28720560 can be written as Twenty-eight million, seven hundred twenty thousand, five hundred sixty.

Scientific notation

• Scientific notation: 2.872056 × 10⁷

Factors of 28720560

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 87

Divisors of 28720560

• Number of divisors d(n): 240
• Complete list of divisors:
  1 2 3 4 5 6 8 10 11 12 15 16 20 22 23 24 30 33 40 43 44 46 48 55 60 66 69 80 86 88 92 110 115 120 121 129 132 138 165 172 176 184 215 220 230 240 242 253 258 264 276 330 344 345 363 368 430 440 460 473 484 506 516 528 552 605 645 660 688 690 726 759 860 880 920 946 968 989 1012 1032 1104 1210 1265 1290 1320 1380 1419 1452 1518 1720 1815 1840 1892 1936 1978 2024 2064 2365 2420 2530 2580 2640 2760 2783 2838 2904 2967 3036 3440 3630 3784 3795 3956 4048 4730 4840 4945 5060 5160 5203 5520 5566 5676 5808 5934 6072 7095 7260 7568 7590 7912 8349 9460 9680 9890 10120 10320 10406 10879 11132 11352 11868 12144 13915 14190 14520 14835 15180 15609 15824 16698 18920 19780 20240 20812 21758 22264 22704 23736 26015 27830 28380 29040 29670 30360 31218 32637 33396 37840 39560 41624 41745 43516 44528 47472 52030 54395 55660 56760 59340 60720 62436 65274 66792 78045 79120 83248 83490 87032 104060 108790 111320 113520 118680 119669 124872 130548 133584 156090 163185 166980 174064 208120 217580 222640 237360 239338 249744 261096 312180 326370 333960 359007 416240 435160 478676 522192 598345 624360 652740 667920 718014 870320 957352 1196690 1248720 1305480 1436028 1795035 1914704 2393380 2610960 2872056 3590070 4786760 5744112 7180140 9573520 14360280 28720560
• Sum of all divisors σ(n): 104493312
• Sum of proper divisors (its aliquot sum) s(n): 75772752
• 28720560 is an abundant number, because the sum of its proper divisors (75772752) is greater than itself. Its abundance is 47052192

Bases of 28720560

• Binary: 1101101100011110110110000₂
• Hexadecimal: 0x1B63DB0
• Base-36: H3KXC

Squares and roots of 28720560

• 28720560 squared (28720560²) is 824870566713600
• 28720560 cubed (28720560³) is 23690744603531951616000
• The square root of 28720560 is 5359.1566500709
• The cube root of 28720560 is 306.2416818509

Scales and comparisons

• 28,720,560 seconds is equal to 47 weeks, 3 days, 9 hours, 56 minutes.
• To count from 1 to 28,720,560 would take you about nineteen 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 28720560 cubic inches would be around 25.5 feet tall.

Recreational maths with 28720560

• 28720560 backwards is 06502782
• 28720560 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 28720560's digits is 30
• More coming soon!