128240640

Names of 128240640

• Cardinal: 128240640 can be written as One hundred twenty-eight million, two hundred forty thousand, six hundred forty.

Scientific notation

• Scientific notation: 1.2824064 × 10⁸

Factors of 128240640

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 16
• Sum of prime factors: 44

Divisors of 128240640

• Number of divisors d(n): 396
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 11 12 15 16 18 20 22 23 24 30 32 33 36 40 44 45 46 48 55 60 64 66 69 72 80 88 90 92 96 99 110 115 120 121 128 132 138 144 160 165 176 180 184 192 198 207 220 230 240 242 253 256 264 276 288 320 330 345 352 360 363 368 384 396 414 440 460 480 484 495 506 512 528 552 576 605 640 660 690 704 720 726 736 759 768 792 828 880 920 960 968 990 1012 1024 1035 1056 1089 1104 1152 1210 1265 1280 1320 1380 1408 1440 1452 1472 1518 1536 1584 1656 1760 1815 1840 1920 1936 1980 2024 2070 2112 2178 2208 2277 2304 2420 2530 2560 2640 2760 2783 2816 2880 2904 2944 3036 3072 3168 3312 3520 3630 3680 3795 3840 3872 3960 4048 4140 4224 4356 4416 4554 4608 4840 5060 5120 5280 5445 5520 5566 5632 5760 5808 5888 6072 6336 6624 7040 7260 7360 7590 7680 7744 7920 8096 8280 8349 8448 8712 8832 9108 9216 9680 10120 10560 10890 11040 11132 11264 11385 11520 11616 11776 12144 12672 13248 13915 14080 14520 14720 15180 15360 15488 15840 16192 16560 16698 16896 17424 17664 18216 19360 20240 21120 21780 22080 22264 22770 23040 23232 23552 24288 25047 25344 26496 27830 28160 29040 29440 30360 30976 31680 32384 33120 33396 33792 34848 35328 36432 38720 40480 41745 42240 43560 44160 44528 45540 46080 46464 48576 50094 50688 52992 55660 56320 58080 58880 60720 61952 63360 64768 66240 66792 69696 70656 72864 77440 80960 83490 84480 87120 88320 89056 91080 92928 97152 100188 101376 105984 111320 116160 117760 121440 123904 125235 126720 129536 132480 133584 139392 145728 154880 161920 166980 168960 174240 176640 178112 182160 185856 194304 200376 211968 222640 232320 242880 250470 253440 259072 264960 267168 278784 291456 309760 323840 333960 348480 353280 356224 364320 371712 388608 400752 445280 464640 485760 500940 506880 529920 534336 557568 582912 619520 647680 667920 696960 712448 728640 777216 801504 890560 929280 971520 1001880 1059840 1068672 1115136 1165824 1295360 1335840 1393920 1424896 1457280 1603008 1781120 1858560 1943040 2003760 2137344 2331648 2671680 2787840 2849792 2914560 3206016 3562240 3886080 4007520 4274688 5343360 5575680 5829120 6412032 7124480 8015040 8549376 10686720 11658240 12824064 14248960 16030080 21373440 25648128 32060160 42746880 64120320 128240640
• Sum of all divisors σ(n): 509653872
• Sum of proper divisors (its aliquot sum) s(n): 381413232
• 128240640 is an abundant number, because the sum of its proper divisors (381413232) is greater than itself. Its abundance is 253172592

Bases of 128240640

• Binary: 111101001001100110000000000₂
• Hexadecimal: 0x7A4CC00
• Base-36: 24CN40

Squares and roots of 128240640

• 128240640 squared (128240640²) is 16445661747609600
• 128240640 cubed (128240640³) is 2109002187736973574144000
• The square root of 128240640 is 11324.3383912703
• The cube root of 128240640 is 504.2840424603

Scales and comparisons

• 128,240,640 seconds is equal to 4 years, 4 weeks, 6 hours, 24 minutes.
• To count from 1 to 128,240,640 would take you about 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 128240640 cubic inches would be around 42 feet tall.

Recreational maths with 128240640

• 128240640 backwards is 046042821
• The number of decimal digits it has is: 9
• The sum of 128240640's digits is 27
• More coming soon!