1215128740

Names of 1215128740

• Cardinal: 1215128740 can be written as One billion, two hundred fifteen million, one hundred twenty-eight thousand, seven hundred forty.

Scientific notation

• Scientific notation: 1.21512874 × 10⁹

Factors of 1215128740

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 52154

Divisors of 1215128740

• Number of divisors d(n): 48
• Complete list of divisors:
  1 2 4 5 7 10 14 20 28 35 70 140 167 334 668 835 1169 1670 2338 3340 4676 5845 11690 23380 51973 103946 207892 259865 363811 519730 727622 1039460 1455244 1819055 3638110 7276220 8679491 17358982 34717964 43397455 60756437 86794910 121512874 173589820 243025748 303782185 607564370 1215128740
• Sum of all divisors σ(n): 2933828352
• Sum of proper divisors (its aliquot sum) s(n): 1718699612
• 1215128740 is an abundant number, because the sum of its proper divisors (1718699612) is greater than itself. Its abundance is 503570872

Bases of 1215128740

• Binary: 1001000011011010110010010100100₂
• Hexadecimal: 0x486D64A4
• Base-36: K3GFC4

Squares and roots of 1215128740

• 1215128740 squared (1215128740²) is 1476537854773987600
• 1215128740 cubed (1215128740³) is 1794183583033818537163624000
• The square root of 1215128740 is 34858.6967627879
• The cube root of 1215128740 is 1067.1056784475

Scales and comparisons

• 1,215,128,740 seconds is equal to 38 years, 33 weeks, 23 hours, 45 minutes, 40 seconds.
• To count from 1 to 1,215,128,740 would take you about seventy-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 1215128740 cubic inches would be around 88.9 feet tall.

Recreational maths with 1215128740

• 1215128740 backwards is 0478215121
• The number of decimal digits it has is: 10
• The sum of 1215128740's digits is 31
• More coming soon!