12991860

Names of 12991860

• Cardinal: 12991860 can be written as Twelve million, nine hundred ninety-one thousand, eight hundred sixty.

Scientific notation

• Scientific notation: 1.299186 × 10⁷

Factors of 12991860

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 508

Divisors of 12991860

• Number of divisors d(n): 144
• Complete list of divisors:
  1 2 3 4 5 6 7 9 10 12 14 15 18 20 21 27 28 30 35 36 42 45 49 54 60 63 70 84 90 98 105 108 126 135 140 147 180 189 196 210 245 252 270 294 315 378 420 441 490 491 540 588 630 735 756 882 945 980 982 1260 1323 1470 1473 1764 1890 1964 2205 2455 2646 2940 2946 3437 3780 4410 4419 4910 5292 5892 6615 6874 7365 8820 8838 9820 10311 13230 13257 13748 14730 17185 17676 20622 22095 24059 26460 26514 29460 30933 34370 41244 44190 48118 51555 53028 61866 66285 68740 72177 88380 92799 96236 103110 120295 123732 132570 144354 154665 185598 206220 216531 240590 265140 288708 309330 360885 371196 433062 463995 481180 618660 649593 721770 866124 927990 1082655 1299186 1443540 1855980 2165310 2598372 3247965 4330620 6495930 12991860
• Sum of all divisors σ(n): 47113920
• Sum of proper divisors (its aliquot sum) s(n): 34122060
• 12991860 is an abundant number, because the sum of its proper divisors (34122060) is greater than itself. Its abundance is 21130200

Bases of 12991860

• Binary: 110001100011110101110100₂
• Hexadecimal: 0xC63D74
• Base-36: 7QGL0

Squares and roots of 12991860

• 12991860 squared (12991860²) is 168788426259600
• 12991860 cubed (12991860³) is 2192875603585046856000
• The square root of 12991860 is 3604.4222838063
• The cube root of 12991860 is 235.0843819501

Scales and comparisons

• 12,991,860 seconds is equal to 21 weeks, 3 days, 8 hours, 51 minutes.
• To count from 1 to 12,991,860 would take you about thirty-two weeks!

  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 12991860 cubic inches would be around 19.6 feet tall.

Recreational maths with 12991860

• 12991860 backwards is 06819921
• 12991860 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 12991860's digits is 36
• More coming soon!