1681281728

Names of 1681281728

• Cardinal: 1681281728 can be written as One billion, six hundred eighty-one million, two hundred eighty-one thousand, seven hundred twenty-eight.

Scientific notation

• Scientific notation: 1.681281728 × 10⁹

Factors of 1681281728

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 196

Divisors of 1681281728

• Number of divisors d(n): 224
• Complete list of divisors:
  1 2 4 7 8 14 16 19 28 29 32 38 49 56 58 64 76 98 112 116 133 139 152 196 203 224 232 266 278 304 343 392 406 448 464 532 551 556 608 686 784 812 928 931 973 1064 1102 1112 1216 1372 1421 1568 1624 1856 1862 1946 2128 2204 2224 2641 2744 2842 3136 3248 3724 3857 3892 4031 4256 4408 4448 5282 5488 5684 6496 6517 6811 7448 7714 7784 8062 8512 8816 8896 9947 10564 10976 11368 12992 13034 13622 14896 15428 15568 16124 17632 18487 19894 21128 21952 22736 26068 26999 27244 28217 29792 30856 31136 32248 35264 36974 39788 42256 45472 47677 52136 53998 54488 56434 59584 61712 62272 64496 73948 76589 79576 84512 90944 95354 104272 107996 108976 112868 123424 128992 129409 147896 153178 159152 169024 188993 190708 197519 208544 215992 217952 225736 246848 257984 258818 295792 306356 318304 377986 381416 395038 417088 431984 435904 451472 517636 536123 591584 612712 636608 755972 762832 790076 863968 902944 905863 1035272 1072246 1183168 1225424 1382633 1511944 1525664 1580152 1727936 1805888 1811726 2070544 2144492 2450848 2765266 3023888 3051328 3160304 3623452 3752861 4141088 4288984 4901696 5530532 6047776 6320608 7246904 7505722 8282176 8577968 11061064 12095552 12641216 14493808 15011444 17155936 22122128 26270027 28987616 30022888 34311872 44244256 52540054 57975232 60045776 88488512 105080108 120091552 210160216 240183104 420320432 840640864 1681281728
• Sum of all divisors σ(n): 4267200000
• Sum of proper divisors (its aliquot sum) s(n): 2585918272
• 1681281728 is an abundant number, because the sum of its proper divisors (2585918272) is greater than itself. Its abundance is 904636544

Bases of 1681281728

• Binary: 1100100001101100101001011000000₂
• Hexadecimal: 0x643652C0
• Base-36: RSZPA8

Squares and roots of 1681281728

• 1681281728 squared (1681281728²) is 2826708248906665984
• 1681281728 cubed (1681281728³) is 4752492929273653496298340352
• The square root of 1681281728 is 41003.4355633769
• The cube root of 1681281728 is 1189.0866347807

Scales and comparisons

• 1,681,281,728 seconds is equal to 53 years, 23 weeks, 6 days, 6 hours, 42 minutes, 8 seconds.
• To count from 1 to 1,681,281,728 would take you about one hundred 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 1681281728 cubic inches would be around 99.1 feet tall.

Recreational maths with 1681281728

• 1681281728 backwards is 8271821861
• The number of decimal digits it has is: 10
• The sum of 1681281728's digits is 44
• More coming soon!