128728669440

Names of 128728669440

• Cardinal: 128728669440 can be written as One hundred twenty-eight billion, seven hundred twenty-eight million, six hundred sixty-nine thousand, four hundred forty.

Scientific notation

• Scientific notation: 1.2872866944 × 10¹¹

Factors of 128728669440

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 4789030

Divisors of 128728669440

• Number of divisors d(n): 144
• Complete list of divisors:
  1 2 3 4 5 6 7 8 10 12 14 15 16 20 21 24 28 30 32 35 40 42 48 56 60 64 70 80 84 96 105 112 120 128 140 160 168 192 210 224 240 256 280 320 336 384 420 448 480 560 640 672 768 840 896 960 1120 1280 1344 1680 1792 1920 2240 2688 3360 3840 4480 5376 6720 8960 13440 26880 4789013 9578026 14367039 19156052 23945065 28734078 33523091 38312104 47890130 57468156 67046182 71835195 76624208 95780260 100569273 114936312 134092364 143670390 153248416 167615455 191560520 201138546 229872624 268184728 287340780 306496832 335230910 383121040 402277092 459745248 502846365 536369456 574681560 612993664 670461820 766242080 804554184 919490496 1005692730 1072738912 1149363120 1225987328 1340923640 1532484160 1609108368 1838980992 2011385460 2145477824 2298726240 2681847280 3064968320 3218216736 3677961984 4022770920 4290955648 4597452480 5363694560 6129936640 6436433472 8045541840 8581911296 9194904960 10727389120 12872866944 16091083680 18389809920 21454778240 25745733888 32182167360 42909556480 64364334720 128728669440
• Sum of all divisors σ(n): 469859741568
• Sum of proper divisors (its aliquot sum) s(n): 341131072128
• 128728669440 is an abundant number, because the sum of its proper divisors (341131072128) is greater than itself. Its abundance is 212402402688

Bases of 128728669440

• Binary: 1110111111000110100111001110100000000₂
• Hexadecimal: 0x1DF8D39D00
• Base-36: 1N4XQ51C

Squares and roots of 128728669440

• 128728669440 squared (128728669440²) is 16571070335792789913600
• 128728669440 cubed (128728669440³) is 2133171835523259853123180560384000
• The square root of 128728669440 is 358787.7777182495
• The cube root of 128728669440 is 5049.2292970181

Scales and comparisons

• 128,728,669,440 seconds is equal to 4,093 years, 9 weeks, 3 hours, 44 minutes.
• To count from 1 to 128,728,669,440 would take you about eight thousand, one hundred eighty-six 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 128728669440 cubic inches would be around 420.8 feet tall.

Recreational maths with 128728669440

• 128728669440 backwards is 044966827821
• The number of decimal digits it has is: 12
• The sum of 128728669440's digits is 57
• More coming soon!