30891889920

Names of 30891889920

• Cardinal: 30891889920 can be written as Thirty billion, eight hundred ninety-one million, eight hundred eighty-nine thousand, nine hundred twenty.

Scientific notation

• Scientific notation: 3.089188992 × 10¹⁰

Factors of 30891889920

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 8044773

Divisors of 30891889920

• Number of divisors d(n): 72
• Complete list of divisors:
  1 2 3 4 5 6 8 10 12 15 16 20 24 30 32 40 48 60 64 80 96 120 128 160 192 240 256 320 384 480 640 768 960 1280 1920 3840 8044763 16089526 24134289 32179052 40223815 48268578 64358104 80447630 96537156 120671445 128716208 160895260 193074312 241342890 257432416 321790520 386148624 482685780 514864832 643581040 772297248 965371560 1029729664 1287162080 1544594496 1930743120 2059459328 2574324160 3089188992 3861486240 5148648320 6178377984 7722972480 10297296640 15445944960 30891889920
• Sum of all divisors σ(n): 98660985696
• Sum of proper divisors (its aliquot sum) s(n): 67769095776
• 30891889920 is an abundant number, because the sum of its proper divisors (67769095776) is greater than itself. Its abundance is 36877205856

Bases of 30891889920

• Binary: 11100110001010011001101010100000000₂
• Hexadecimal: 0x7314CD500
• Base-36: E6W8ETC

Squares and roots of 30891889920

• 30891889920 squared (30891889920²) is 954308862829397606400
• 30891889920 cubed (30891889920³) is 29480404340206130596820287488000
• The square root of 30891889920 is 175760.8884820511
• The cube root of 30891889920 is 3137.7246257911

Scales and comparisons

• 30,891,889,920 seconds is equal to 982 years, 13 weeks, 6 days, 32 minutes.
• To count from 1 to 30,891,889,920 would take you about one thousand, nine hundred sixty-four 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 30891889920 cubic inches would be around 261.5 feet tall.

Recreational maths with 30891889920

• 30891889920 backwards is 02998819803
• The number of decimal digits it has is: 11
• The sum of 30891889920's digits is 57
• More coming soon!