28409920

Names of 28409920

• Cardinal: 28409920 can be written as Twenty-eight million, four hundred nine thousand, nine hundred twenty.

Scientific notation

• Scientific notation: 2.840992 × 10⁷

Factors of 28409920

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 1178

Divisors of 28409920

• Number of divisors d(n): 112
• Complete list of divisors:
  1 2 4 5 7 8 10 11 14 16 20 22 28 32 35 40 44 55 56 64 70 77 80 88 110 112 140 154 160 176 220 224 280 308 320 352 385 440 448 560 616 704 770 880 1120 1153 1232 1540 1760 2240 2306 2464 3080 3520 4612 4928 5765 6160 8071 9224 11530 12320 12683 16142 18448 23060 24640 25366 32284 36896 40355 46120 50732 63415 64568 73792 80710 88781 92240 101464 126830 129136 161420 177562 184480 202928 253660 258272 322840 355124 368960 405856 443905 507320 516544 645680 710248 811712 887810 1014640 1291360 1420496 1775620 2029280 2582720 2840992 3551240 4058560 5681984 7102480 14204960 28409920
• Sum of all divisors σ(n): 84417408
• Sum of proper divisors (its aliquot sum) s(n): 56007488
• 28409920 is an abundant number, because the sum of its proper divisors (56007488) is greater than itself. Its abundance is 27597568

Bases of 28409920

• Binary: 1101100011000000001000000₂
• Hexadecimal: 0x1B18040
• Base-36: GWX8G

Squares and roots of 28409920

• 28409920 squared (28409920²) is 807123554406400
• 28409920 cubed (28409920³) is 22930315610801471488000
• The square root of 28409920 is 5330.0956839441
• The cube root of 28409920 is 305.1335793993

Scales and comparisons

• 28,409,920 seconds is equal to 46 weeks, 6 days, 19 hours, 38 minutes, 40 seconds.
• To count from 1 to 28,409,920 would take you about eighteen 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 28409920 cubic inches would be around 25.4 feet tall.

Recreational maths with 28409920

• 28409920 backwards is 02990482
• The number of decimal digits it has is: 8
• The sum of 28409920's digits is 34
• More coming soon!