28138500

Names of 28138500

• Cardinal: 28138500 can be written as Twenty-eight million, one hundred thirty-eight thousand, five hundred.

Scientific notation

• Scientific notation: 2.81385 × 10⁷

Factors of 28138500

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 60

Divisors of 28138500

• Number of divisors d(n): 216
• Complete list of divisors:
  1 2 3 4 5 6 9 10 12 13 15 18 20 25 26 30 36 37 39 45 50 52 60 65 74 75 78 90 100 111 117 125 130 148 150 156 169 180 185 195 222 225 234 250 260 300 325 333 338 370 375 390 444 450 468 481 500 507 555 585 650 666 676 740 750 780 845 900 925 962 975 1014 1110 1125 1170 1300 1332 1443 1500 1521 1625 1665 1690 1850 1924 1950 2028 2220 2250 2340 2405 2535 2775 2886 2925 3042 3250 3330 3380 3700 3900 4225 4329 4500 4625 4810 4875 5070 5550 5772 5850 6084 6253 6500 6660 7215 7605 8325 8450 8658 9250 9620 9750 10140 11100 11700 12025 12506 12675 13875 14430 14625 15210 16650 16900 17316 18500 18759 19500 21125 21645 24050 25012 25350 27750 28860 29250 30420 31265 33300 36075 37518 38025 41625 42250 43290 48100 50700 55500 56277 58500 60125 62530 63375 72150 75036 76050 83250 84500 86580 93795 108225 112554 120250 125060 126750 144300 152100 156325 166500 180375 187590 190125 216450 225108 240500 253500 281385 312650 360750 375180 380250 432900 468975 541125 562770 625300 721500 760500 781625 937950 1082250 1125540 1406925 1563250 1875900 2164500 2344875 2813850 3126500 4689750 5627700 7034625 9379500 14069250 28138500
• Sum of all divisors σ(n): 98718984
• Sum of proper divisors (its aliquot sum) s(n): 70580484
• 28138500 is an abundant number, because the sum of its proper divisors (70580484) is greater than itself. Its abundance is 42441984

Bases of 28138500

• Binary: 1101011010101110000000100₂
• Hexadecimal: 0x1AD5C04
• Base-36: GR3T0

Squares and roots of 28138500

• 28138500 squared (28138500²) is 791775182250000
• 28138500 cubed (28138500³) is 22279365965741625000000
• The square root of 28138500 is 5304.5734984069
• The cube root of 28138500 is 304.1587496115

Scales and comparisons

• 28,138,500 seconds is equal to 46 weeks, 3 days, 16 hours, 15 minutes.
• To count from 1 to 28,138,500 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 28138500 cubic inches would be around 25.3 feet tall.

Recreational maths with 28138500

• 28138500 backwards is 00583182
• The number of decimal digits it has is: 8
• The sum of 28138500's digits is 27
• More coming soon!