13291280

Names of 13291280

• Cardinal: 13291280 can be written as Thirteen million, two hundred ninety-one thousand, two hundred eighty.

Scientific notation

• Scientific notation: 1.329128 × 10⁷

Factors of 13291280

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 390

Divisors of 13291280

• Number of divisors d(n): 80
• Complete list of divisors:
  1 2 4 5 8 10 16 17 20 29 34 40 58 68 80 85 116 136 145 170 232 272 290 337 340 464 493 580 674 680 986 1160 1348 1360 1685 1972 2320 2465 2696 3370 3944 4930 5392 5729 6740 7888 9773 9860 11458 13480 19546 19720 22916 26960 28645 39092 39440 45832 48865 57290 78184 91664 97730 114580 156368 166141 195460 229160 332282 390920 458320 664564 781840 830705 1329128 1661410 2658256 3322820 6645640 13291280
• Sum of all divisors σ(n): 33948720
• Sum of proper divisors (its aliquot sum) s(n): 20657440
• 13291280 is an abundant number, because the sum of its proper divisors (20657440) is greater than itself. Its abundance is 7366160

Bases of 13291280

• Binary: 110010101100111100010000₂
• Hexadecimal: 0xCACF10
• Base-36: 7WVM8

Squares and roots of 13291280

• 13291280 squared (13291280²) is 176658124038400
• 13291280 cubed (13291280³) is 2348012590869105152000
• The square root of 13291280 is 3645.7207792149
• The cube root of 13291280 is 236.8766590435

Scales and comparisons

• 13,291,280 seconds is equal to 21 weeks, 6 days, 20 hours, 1 minute, 20 seconds.
• To count from 1 to 13,291,280 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 13291280 cubic inches would be around 19.7 feet tall.

Recreational maths with 13291280

• 13291280 backwards is 08219231
• The number of decimal digits it has is: 8
• The sum of 13291280's digits is 26
• More coming soon!