28220478

Names of 28220478

• Cardinal: 28220478 can be written as Twenty-eight million, two hundred twenty thousand, four hundred seventy-eight.

Scientific notation

• Scientific notation: 2.8220478 × 10⁷

Factors of 28220478

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 1121

Divisors of 28220478

• Number of divisors d(n): 64
• Complete list of divisors:
  1 2 3 6 11 13 22 26 31 33 39 62 66 78 93 143 186 286 341 403 429 682 806 858 1023 1061 1209 2046 2122 2418 3183 4433 6366 8866 11671 13299 13793 23342 26598 27586 32891 35013 41379 65782 70026 82758 98673 151723 197346 303446 361801 427583 455169 723602 855166 910338 1085403 1282749 2170806 2565498 4703413 9406826 14110239 28220478
• Sum of all divisors σ(n): 68511744
• Sum of proper divisors (its aliquot sum) s(n): 40291266
• 28220478 is an abundant number, because the sum of its proper divisors (40291266) is greater than itself. Its abundance is 12070788

Bases of 28220478

• Binary: 1101011101001110000111110₂
• Hexadecimal: 0x1AE9C3E
• Base-36: GSV26

Squares and roots of 28220478

• 28220478 squared (28220478²) is 796395378548484
• 28220478 cubed (28220478³) is 22474658259629164655352
• The square root of 28220478 is 5312.2949842793
• The cube root of 28220478 is 304.4538393847

Scales and comparisons

• 28,220,478 seconds is equal to 46 weeks, 4 days, 15 hours, 1 minute, 18 seconds.
• To count from 1 to 28,220,478 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 28220478 cubic inches would be around 25.4 feet tall.

Recreational maths with 28220478

• 28220478 backwards is 87402282
• 28220478 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 28220478's digits is 33
• More coming soon!