7157994138

Names of 7157994138

• Cardinal: 7157994138 can be written as Seven billion, one hundred fifty-seven million, nine hundred ninety-four thousand, one hundred thirty-eight.

Scientific notation

• Scientific notation: 7.157994138 × 10⁹

Factors of 7157994138

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 16973

Divisors of 7157994138

• Number of divisors d(n): 64
• Complete list of divisors:
  1 2 3 6 9 18 27 54 81 97 162 194 243 291 486 582 729 873 1458 1746 2187 2619 4374 5238 7857 15714 16871 23571 33742 47142 50613 70713 101226 141426 151839 212139 303678 424278 455517 911034 1366551 1636487 2733102 3272974 4099653 4909461 8199306 9818922 12298959 14728383 24597918 29456766 36896877 44185149 73793754 88370298 132555447 265110894 397666341 795332682 1192999023 2385998046 3578997069 7157994138
• Sum of all divisors σ(n): 16270007040
• Sum of proper divisors (its aliquot sum) s(n): 9112012902
• 7157994138 is an abundant number, because the sum of its proper divisors (9112012902) is greater than itself. Its abundance is 1954018764

Bases of 7157994138

• Binary: 110101010101001100101001010011010₂
• Hexadecimal: 0x1AAA6529A
• Base-36: 3ADONMI

Squares and roots of 7157994138

• 7157994138 squared (7157994138²) is 51236880079642363044
• 7157994138 cubed (7157994138³) is 366753287259489007805419836072
• The square root of 7157994138 is 84604.9297499857
• The cube root of 7157994138 is 1927.2162376561

Scales and comparisons

• 7,157,994,138 seconds is equal to 227 years, 31 weeks, 2 days, 3 hours, 42 minutes, 18 seconds.
• To count from 1 to 7,157,994,138 would take you about four hundred fifty-five 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 7157994138 cubic inches would be around 160.6 feet tall.

Recreational maths with 7157994138

• 7157994138 backwards is 8314997517
• 7157994138 is a Harshad number.
• The number of decimal digits it has is: 10
• The sum of 7157994138's digits is 54
• More coming soon!