12991440

Names of 12991440

• Cardinal: 12991440 can be written as Twelve million, nine hundred ninety-one thousand, four hundred forty.

Scientific notation

• Scientific notation: 1.299144 × 10⁷

Factors of 12991440

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 84

Divisors of 12991440

• Number of divisors d(n): 320
• Complete list of divisors:
  1 2 3 4 5 6 7 8 10 11 12 14 15 16 19 20 21 22 24 28 30 33 35 37 38 40 42 44 48 55 56 57 60 66 70 74 76 77 80 84 88 95 105 110 111 112 114 120 132 133 140 148 152 154 165 168 176 185 190 209 210 220 222 228 231 240 259 264 266 280 285 296 304 308 330 336 370 380 385 399 407 418 420 440 444 456 462 518 528 532 555 560 570 592 616 627 660 665 703 740 760 770 777 798 814 836 840 880 888 912 924 1036 1045 1064 1110 1140 1155 1221 1232 1254 1295 1320 1330 1406 1463 1480 1520 1540 1554 1596 1628 1672 1680 1776 1848 1995 2035 2072 2090 2109 2128 2220 2280 2310 2442 2508 2590 2640 2660 2812 2849 2926 2960 3080 3108 3135 3192 3256 3344 3515 3696 3885 3990 4070 4144 4180 4218 4389 4440 4560 4620 4884 4921 5016 5180 5320 5624 5698 5852 6105 6160 6216 6270 6384 6512 7030 7315 7733 7770 7980 8140 8360 8436 8547 8778 8880 9240 9768 9842 10032 10360 10545 10640 11248 11396 11704 12210 12432 12540 14060 14245 14630 14763 15466 15540 15960 16280 16720 16872 17094 17556 18480 19536 19684 20720 21090 21945 22792 23199 23408 24420 24605 25080 28120 28490 29260 29526 30932 31080 31920 32560 33744 34188 35112 38665 39368 42180 42735 43890 45584 46398 48840 49210 50160 54131 56240 56980 58520 59052 61864 62160 68376 70224 73815 77330 78736 84360 85470 87780 92796 97680 98420 108262 113960 115995 117040 118104 123728 136752 147630 154660 162393 168720 170940 175560 185592 196840 216524 227920 231990 236208 270655 295260 309320 324786 341880 351120 371184 393680 433048 463980 541310 590520 618640 649572 683760 811965 866096 927960 1082620 1181040 1299144 1623930 1855920 2165240 2598288 3247860 4330480 6495720 12991440
• Sum of all divisors σ(n): 54282240
• Sum of proper divisors (its aliquot sum) s(n): 41290800
• 12991440 is an abundant number, because the sum of its proper divisors (41290800) is greater than itself. Its abundance is 28299360

Bases of 12991440

• Binary: 110001100011101111010000₂
• Hexadecimal: 0xC63BD0
• Base-36: 7QG9C

Squares and roots of 12991440

• 12991440 squared (12991440²) is 168777513273600
• 12991440 cubed (12991440³) is 2192662937043177984000
• The square root of 12991440 is 3604.3640215717
• The cube root of 12991440 is 235.0818486587

Scales and comparisons

• 12,991,440 seconds is equal to 21 weeks, 3 days, 8 hours, 44 minutes.
• To count from 1 to 12,991,440 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 12991440 cubic inches would be around 19.6 feet tall.

Recreational maths with 12991440

• 12991440 backwards is 04419921
• 12991440 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 12991440's digits is 30
• More coming soon!