28388788155

Names of 28388788155

• Cardinal: 28388788155 can be written as Twenty-eight billion, three hundred eighty-eight million, seven hundred eighty-eight thousand, one hundred fifty-five.

Scientific notation

• Scientific notation: 2.8388788155 × 10¹⁰

Factors of 28388788155

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 191

Divisors of 28388788155

• Number of divisors d(n): 384
• Complete list of divisors:
  1 3 5 7 9 13 15 17 19 21 35 39 45 51 57 63 65 85 91 95 105 117 119 127 133 153 169 171 195 221 247 255 273 285 315 323 357 381 399 455 507 585 595 635 663 665 741 765 819 845 855 889 969 1071 1105 1143 1183 1197 1235 1365 1521 1547 1615 1651 1729 1785 1905 1989 1995 2159 2197 2223 2261 2413 2535 2667 2873 2907 3211 3315 3549 3705 4095 4199 4445 4641 4845 4953 5187 5355 5715 5915 5985 6477 6591 6783 7239 7605 7735 8001 8255 8619 8645 9633 9945 10647 10795 10985 11115 11305 11557 12065 12597 13335 13923 14365 14535 14859 15113 15379 15561 16055 16891 17745 19431 19773 20111 20349 20995 21463 21717 22477 23205 24765 25857 25935 28067 28899 29393 31369 32385 32955 33915 34671 36195 37349 37791 40005 41021 41743 43095 45339 46137 48165 50673 53235 54587 57785 60333 62985 64389 67431 69615 74295 75565 76895 77805 84201 84455 88179 94107 97155 98865 100555 101745 104013 107315 108585 112047 112385 123063 125229 129285 136017 138411 140335 144495 146965 150241 152019 156845 163761 173355 180999 186745 188955 193167 196469 202293 205105 208715 219583 226695 230685 252603 253365 261443 264537 272935 279019 282321 287147 292201 301665 321945 336141 337155 364871 369189 375687 382109 407797 421005 440895 450723 470535 491283 520065 533273 560235 589407 615315 626145 658749 680085 692055 709631 751205 760095 784329 818805 837057 861441 876603 904995 965835 982345 1011465 1094613 1097915 1146327 1223391 1263015 1307215 1322685 1352169 1395095 1411605 1435735 1461005 1599819 1680705 1768221 1824355 1845945 1878435 1910545 1953133 1976247 2038985 2128893 2253615 2352987 2456415 2511171 2554097 2584323 2629809 2666365 2854579 2947035 3283839 3293745 3438981 3548155 3670173 3732911 3921645 4185285 4307205 4383015 4743323 4799457 4967417 5301361 5473065 5731635 5859399 6116955 6386679 6760845 6932549 7662291 7999095 8563737 8841105 9765665 9881235 10644465 11198733 11764935 12555855 12770485 12921615 13149045 14229969 14272895 14902251 15904083 16419195 17194905 17578197 18350865 18664555 20797647 22986873 23716615 23997285 24837085 25691211 26506805 29296995 31933395 33203261 33596199 34662745 37109527 38311455 42689907 42818685 44706753 47712249 48527843 55993665 62392941 71149845 74511255 79520415 87890985 90123137 99609783 103988235 111328581 114934365 128456055 145583529 166016305 167980995 185547635 213449535 223533765 238561245 242639215 270369411 298829349 311964705 333985743 436750587 450615685 498048915 556642905 630861959 727917645 811108233 1351847055 1494146745 1669928715 1892585877 2183752935 3154309795 4055541165 5677757631 9462929385 28388788155
• Sum of all divisors σ(n): 68434329600
• Sum of proper divisors (its aliquot sum) s(n): 40045541445
• 28388788155 is an abundant number, because the sum of its proper divisors (40045541445) is greater than itself. Its abundance is 11656753290

Bases of 28388788155

• Binary: 11010011100000110101000011110111011₂
• Hexadecimal: 0x69C1A87BB
• Base-36: D1HY94R

Squares and roots of 28388788155

• 28388788155 squared (28388788155²) is 805923292909468304025
• 28388788155 cubed (28388788155³) is 22879185631586909276652858823875
• The square root of 28388788155 is 168489.7271497583
• The cube root of 28388788155 is 3050.5790589171

Scales and comparisons

• 28,388,788,155 seconds is equal to 902 years, 35 weeks, 22 hours, 29 minutes, 15 seconds.
• To count from 1 to 28,388,788,155 would take you about one thousand, eight hundred five 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 28388788155 cubic inches would be around 254.2 feet tall.

Recreational maths with 28388788155

• 28388788155 backwards is 55188788382
• 28388788155 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 28388788155's digits is 63
• More coming soon!