13781040

Names of 13781040

• Cardinal: 13781040 can be written as Thirteen million, seven hundred eighty-one thousand and forty.

Scientific notation

• Scientific notation: 1.378104 × 10⁷

Factors of 13781040

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 661

Divisors of 13781040

• Number of divisors d(n): 160
• Complete list of divisors:
  1 2 3 4 5 6 7 8 10 12 13 14 15 16 20 21 24 26 28 30 35 39 40 42 48 52 56 60 65 70 78 80 84 91 104 105 112 120 130 140 156 168 182 195 208 210 240 260 273 280 312 336 364 390 420 455 520 546 560 624 631 728 780 840 910 1040 1092 1262 1365 1456 1560 1680 1820 1893 2184 2524 2730 3120 3155 3640 3786 4368 4417 5048 5460 6310 7280 7572 8203 8834 9465 10096 10920 12620 13251 15144 16406 17668 18930 21840 22085 24609 25240 26502 30288 32812 35336 37860 41015 44170 49218 50480 53004 57421 65624 66255 70672 75720 82030 88340 98436 106008 114842 123045 131248 132510 151440 164060 172263 176680 196872 212016 229684 246090 265020 287105 328120 344526 353360 393744 459368 492180 530040 574210 656240 689052 861315 918736 984360 1060080 1148420 1378104 1722630 1968720 2296840 2756208 3445260 4593680 6890520 13781040
• Sum of all divisors σ(n): 52663296
• Sum of proper divisors (its aliquot sum) s(n): 38882256
• 13781040 is an abundant number, because the sum of its proper divisors (38882256) is greater than itself. Its abundance is 25101216

Bases of 13781040

• Binary: 110100100100100000110000₂
• Hexadecimal: 0xD24830
• Base-36: 87DIO

Squares and roots of 13781040

• 13781040 squared (13781040²) is 189917063481600
• 13781040 cubed (13781040³) is 2617254648522468864000
• The square root of 13781040 is 3712.2823168505
• The cube root of 13781040 is 239.7511309121

Scales and comparisons

• 13,781,040 seconds is equal to 22 weeks, 5 days, 12 hours, 4 minutes.
• To count from 1 to 13,781,040 would take you about thirty-four 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 13781040 cubic inches would be around 20 feet tall.

Recreational maths with 13781040

• 13781040 backwards is 04018731
• 13781040 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 13781040's digits is 24
• More coming soon!