28420021490

Names of 28420021490

• Cardinal: 28420021490 can be written as Twenty-eight billion, four hundred twenty million, twenty-one thousand, four hundred ninety.

Scientific notation

• Scientific notation: 2.842002149 × 10¹⁰

Factors of 28420021490

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 17859

Divisors of 28420021490

• Number of divisors d(n): 64
• Complete list of divisors:
  1 2 5 7 10 14 17 34 35 70 85 119 170 238 595 1190 1459 2918 7295 10213 14590 16369 20426 24803 32738 49606 51065 81845 102130 114583 124015 163690 173621 229166 248030 278273 347242 556546 572915 868105 1145830 1391365 1736210 1947911 2782730 3895822 9739555 19479110 23882371 47764742 119411855 167176597 238823710 334353194 406000307 812000614 835882985 1671765970 2030001535 2842002149 4060003070 5684004298 14210010745 28420021490
• Sum of all divisors σ(n): 61949318400
• Sum of proper divisors (its aliquot sum) s(n): 33529296910
• 28420021490 is an abundant number, because the sum of its proper divisors (33529296910) is greater than itself. Its abundance is 5109275420

Bases of 28420021490

• Binary: 11010011101111101110001110011110010₂
• Hexadecimal: 0x69DF71CF2
• Base-36: D20JOXE

Squares and roots of 28420021490

• 28420021490 squared (28420021490²) is 807697621492061820100
• 28420021490 cubed (28420021490³) is 22954783760226282791650513949000
• The square root of 28420021490 is 168582.3878404859
• The cube root of 28420021490 is 3051.6973975637

Scales and comparisons

• 28,420,021,490 seconds is equal to 903 years, 34 weeks, 5 days, 10 hours, 24 minutes, 50 seconds.
• To count from 1 to 28,420,021,490 would take you about one thousand, eight hundred seven 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 28420021490 cubic inches would be around 254.3 feet tall.

Recreational maths with 28420021490

• 28420021490 backwards is 09412002482
• The number of decimal digits it has is: 11
• The sum of 28420021490's digits is 32
• More coming soon!