28012500

Names of 28012500

• Cardinal: 28012500 can be written as Twenty-eight million, twelve thousand, five hundred.

Scientific notation

• Scientific notation: 2.80125 × 10⁷

Factors of 28012500

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 93

Divisors of 28012500

• Number of divisors d(n): 144
• Complete list of divisors:
  1 2 3 4 5 6 9 10 12 15 18 20 25 27 30 36 45 50 54 60 75 83 90 100 108 125 135 150 166 180 225 249 250 270 300 332 375 415 450 498 500 540 625 675 747 750 830 900 996 1125 1245 1250 1350 1494 1500 1660 1875 2075 2241 2250 2490 2500 2700 2988 3125 3375 3735 3750 4150 4482 4500 4980 5625 6225 6250 6750 7470 7500 8300 8964 9375 10375 11205 11250 12450 12500 13500 14940 16875 18675 18750 20750 22410 22500 24900 28125 31125 33750 37350 37500 41500 44820 51875 56025 56250 62250 67500 74700 84375 93375 103750 112050 112500 124500 155625 168750 186750 207500 224100 259375 280125 311250 337500 373500 466875 518750 560250 622500 778125 933750 1037500 1120500 1400625 1556250 1867500 2334375 2801250 3112500 4668750 5602500 7003125 9337500 14006250 28012500
• Sum of all divisors σ(n): 91869120
• Sum of proper divisors (its aliquot sum) s(n): 63856620
• 28012500 is an abundant number, because the sum of its proper divisors (63856620) is greater than itself. Its abundance is 35844120

Bases of 28012500

• Binary: 1101010110110111111010100₂
• Hexadecimal: 0x1AB6FD4
• Base-36: GOEL0

Squares and roots of 28012500

• 28012500 squared (28012500²) is 784700156250000
• 28012500 cubed (28012500³) is 21981413126953125000000
• The square root of 28012500 is 5292.6836293133
• The cube root of 28012500 is 303.7040778009

Scales and comparisons

• 28,012,500 seconds is equal to 46 weeks, 2 days, 5 hours, 15 minutes.
• To count from 1 to 28,012,500 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 28012500 cubic inches would be around 25.3 feet tall.

Recreational maths with 28012500

• 28012500 backwards is 00521082
• 28012500 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 28012500's digits is 18
• More coming soon!