28006440

Names of 28006440

• Cardinal: 28006440 can be written as Twenty-eight million, six thousand, four hundred forty.

Scientific notation

• Scientific notation: 2.800644 × 10⁷

Factors of 28006440

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 461

Divisors of 28006440

• Number of divisors d(n): 192
• Complete list of divisors:
  1 2 3 4 5 6 7 8 10 11 12 14 15 20 21 22 24 28 30 33 35 40 42 44 49 55 56 60 66 70 77 84 88 98 105 110 120 132 140 147 154 165 168 196 210 220 231 245 264 280 294 308 330 385 392 420 433 440 462 490 539 588 616 660 735 770 840 866 924 980 1078 1155 1176 1299 1320 1470 1540 1617 1732 1848 1960 2156 2165 2310 2598 2695 2940 3031 3080 3234 3464 4312 4330 4620 4763 5196 5390 5880 6062 6468 6495 8085 8660 9093 9240 9526 10392 10780 12124 12936 12990 14289 15155 16170 17320 18186 19052 21217 21560 23815 24248 25980 28578 30310 32340 33341 36372 38104 42434 45465 47630 51960 57156 60620 63651 64680 66682 71445 72744 84868 90930 95260 100023 106085 114312 121240 127302 133364 142890 166705 169736 181860 190520 200046 212170 233387 254604 266728 285780 318255 333410 363720 400092 424340 466774 500115 509208 571560 636510 666820 700161 800184 848680 933548 1000230 1166935 1273020 1333640 1400322 1867096 2000460 2333870 2546040 2800644 3500805 4000920 4667740 5601288 7001610 9335480 14003220 28006440
• Sum of all divisors σ(n): 106868160
• Sum of proper divisors (its aliquot sum) s(n): 78861720
• 28006440 is an abundant number, because the sum of its proper divisors (78861720) is greater than itself. Its abundance is 50855280

Bases of 28006440

• Binary: 1101010110101100000101000₂
• Hexadecimal: 0x1AB5828
• Base-36: GO9WO

Squares and roots of 28006440

• 28006440 squared (28006440²) is 784360681473600
• 28006440 cubed (28006440³) is 21967150364049489984000
• The square root of 28006440 is 5292.1111099447
• The cube root of 28006440 is 303.6821759185

Scales and comparisons

• 28,006,440 seconds is equal to 46 weeks, 2 days, 3 hours, 34 minutes.
• To count from 1 to 28,006,440 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 28006440 cubic inches would be around 25.3 feet tall.

Recreational maths with 28006440

• 28006440 backwards is 04460082
• 28006440 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 28006440's digits is 24
• More coming soon!