128478042

Names of 128478042

• Cardinal: 128478042 can be written as One hundred twenty-eight million, four hundred seventy-eight thousand and forty-two.

Scientific notation

• Scientific notation: 1.28478042 × 10⁸

Factors of 128478042

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 76

Divisors of 128478042

• Number of divisors d(n): 144
• Complete list of divisors:
  1 2 3 6 7 9 11 14 18 21 22 27 33 42 53 54 63 66 77 99 106 121 126 154 159 189 198 231 242 297 318 363 371 378 462 477 583 594 693 726 742 847 954 1089 1113 1166 1386 1431 1694 1749 2079 2178 2226 2541 2809 2862 3267 3339 3498 4081 4158 5082 5247 5618 6413 6534 6678 7623 8162 8427 10017 10494 12243 12826 15246 15741 16854 19239 19663 20034 22869 24486 25281 30899 31482 36729 38478 39326 44891 45738 50562 57717 58989 61798 73458 75843 89782 92697 110187 115434 117978 134673 151686 173151 176967 185394 216293 220374 269346 278091 339889 346302 353934 404019 432586 530901 556182 648879 679778 808038 834273 1019667 1061802 1212057 1297758 1668546 1946637 2039334 2379223 2424114 3059001 3893274 4758446 5839911 6118002 7137669 9177003 11679822 14275338 18354006 21413007 42826014 64239021 128478042
• Sum of all divisors σ(n): 365547840
• Sum of proper divisors (its aliquot sum) s(n): 237069798
• 128478042 is an abundant number, because the sum of its proper divisors (237069798) is greater than itself. Its abundance is 108591756

Bases of 128478042

• Binary: 111101010000110101101011010₂
• Hexadecimal: 0x7A86B5A
• Base-36: 24HQAI

Squares and roots of 128478042

• 128478042 squared (128478042²) is 16506607276153764
• 128478042 cubed (128478042³) is 2120736582903188889650088
• The square root of 128478042 is 11334.8154815153
• The cube root of 128478042 is 504.5950313459

Scales and comparisons

• 128,478,042 seconds is equal to 4 years, 4 weeks, 3 days, 20 minutes, 42 seconds.
• To count from 1 to 128,478,042 would take you about six years!

  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 128478042 cubic inches would be around 42 feet tall.

Recreational maths with 128478042

• 128478042 backwards is 240874821
• The number of decimal digits it has is: 9
• The sum of 128478042's digits is 36
• More coming soon!