28139475

Names of 28139475

• Cardinal: 28139475 can be written as Twenty-eight million, one hundred thirty-nine thousand, four hundred seventy-five.

Scientific notation

• Scientific notation: 2.8139475 × 10⁷

Factors of 28139475

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 78

Divisors of 28139475

• Number of divisors d(n): 144
• Complete list of divisors:
  1 3 5 7 13 15 19 21 25 31 35 39 49 57 65 75 91 93 95 105 133 147 155 175 195 217 245 247 273 285 325 399 403 455 465 475 525 589 637 651 665 735 741 775 931 975 1085 1209 1225 1235 1365 1425 1519 1729 1767 1911 1995 2015 2275 2325 2793 2821 2945 3185 3255 3325 3675 3705 4123 4557 4655 5187 5425 6045 6175 6825 7595 7657 8463 8645 8835 9555 9975 10075 12103 12369 13965 14105 14725 15925 16275 18525 19747 20615 22785 22971 23275 25935 28861 30225 36309 37975 38285 42315 43225 44175 47775 53599 59241 60515 61845 69825 70525 86583 98735 103075 113925 114855 129675 144305 160797 181545 191425 211575 267995 296205 302575 309225 375193 432915 493675 574275 721525 803985 907725 1125579 1339975 1481025 1875965 2164575 4019925 5627895 9379825 28139475
• Sum of all divisors σ(n): 63329280
• Sum of proper divisors (its aliquot sum) s(n): 35189805
• 28139475 is an abundant number, because the sum of its proper divisors (35189805) is greater than itself. Its abundance is 7050330

Bases of 28139475

• Binary: 1101011010101111111010011₂
• Hexadecimal: 0x1AD5FD3
• Base-36: GR4K3

Squares and roots of 28139475

• 28139475 squared (28139475²) is 791830053275625
• 28139475 cubed (28139475³) is 22281681988398117796875
• The square root of 28139475 is 5304.6653994385
• The cube root of 28139475 is 304.1622626079

Scales and comparisons

• 28,139,475 seconds is equal to 46 weeks, 3 days, 16 hours, 31 minutes, 15 seconds.
• To count from 1 to 28,139,475 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 28139475 cubic inches would be around 25.3 feet tall.

Recreational maths with 28139475

• 28139475 backwards is 57493182
• 28139475 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 28139475's digits is 39
• More coming soon!