129697120728

Names of 129697120728

• Cardinal: 129697120728 can be written as One hundred twenty-nine billion, six hundred ninety-seven million, one hundred twenty thousand, seven hundred twenty-eight.

Scientific notation

• Scientific notation: 1.29697120728 × 10¹¹

Factors of 129697120728

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 67573

Divisors of 129697120728

• Number of divisors d(n): 256
• Complete list of divisors:
  1 2 3 4 6 7 8 9 12 14 18 21 24 27 28 31 36 41 42 54 56 62 63 72 82 84 93 108 123 124 126 164 168 186 189 216 217 246 248 252 279 287 328 369 372 378 434 492 504 558 574 651 738 744 756 837 861 868 984 1107 1116 1148 1271 1302 1476 1512 1674 1722 1736 1953 2214 2232 2296 2542 2583 2604 2952 3348 3444 3813 3906 4428 5084 5166 5208 5859 6696 6888 7626 7749 7812 8856 8897 10168 10332 11439 11718 15252 15498 15624 17794 20664 22878 23436 26691 30504 30996 34317 35588 45756 46872 53382 61992 67489 68634 71176 80073 91512 106764 134978 137268 160146 202467 213528 240219 269956 274536 320292 404934 472423 480438 539912 607401 640584 809868 944846 960876 1214802 1417269 1619736 1822203 1889692 1921752 2092159 2429604 2767049 2834538 3644406 3779384 4184318 4251807 4859208 5534098 5669076 6276477 7288812 8301147 8368636 8503614 11068196 11338152 12552954 12755421 14577624 14645113 16602294 16737272 17007228 18829431 19369343 22136392 24903441 25105908 25510842 29290226 33204588 34014456 37658862 38738686 43935339 49806882 50211816 51021684 56488293 58108029 58580452 66409176 74710323 75317724 77477372 85778519 87870678 99613764 102043368 112976586 116216058 117160904 131806017 149420646 150635448 154954744 171557038 174324087 175741356 199227528 225953172 232432116 257335557 263612034 298841292 343114076 348648174 351482712 395418051 451906344 464864232 514671114 522972261 527224068 597682584 600449633 686228152 697296348 772006671 790836102 1029342228 1045944522 1054448136 1200899266 1394592696 1544013342 1581672204 1801348899 2058684456 2091889044 2316020013 2401798532 3088026684 3163344408 3602697798 4183778088 4632040026 4803597064 5404046697 6176053368 7205395596 9264080052 10808093394 14410791192 16212140091 18528160104 21616186788 32424280182 43232373576 64848560364 129697120728
• Sum of all divisors σ(n): 435391488000
• Sum of proper divisors (its aliquot sum) s(n): 305694367272
• 129697120728 is an abundant number, because the sum of its proper divisors (305694367272) is greater than itself. Its abundance is 175997246544

Bases of 129697120728

• Binary: 1111000110010100011010000000111011000₂
• Hexadecimal: 0x1E328D01D8
• Base-36: 1NKYBEU0

Squares and roots of 129697120728

• 129697120728 squared (129697120728²) is 16821343125133407249984
• 129697120728 cubed (129697120728³) is 2181679770107540331207165324068352
• The square root of 129697120728 is 360134.8646382351
• The cube root of 129697120728 is 5061.8597933689

Scales and comparisons

• 129,697,120,728 seconds is equal to 4,123 years, 50 weeks, 2 days, 1 hour, 58 minutes, 48 seconds.
• To count from 1 to 129,697,120,728 would take you about eight thousand, two hundred forty-seven 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 129697120728 cubic inches would be around 421.8 feet tall.

Recreational maths with 129697120728

• 129697120728 backwards is 827021796921
• 129697120728 is a Harshad number.
• The number of decimal digits it has is: 12
• The sum of 129697120728's digits is 54
• More coming soon!