128789472

Names of 128789472

• Cardinal: 128789472 can be written as One hundred twenty-eight million, seven hundred eighty-nine thousand, four hundred seventy-two.

Scientific notation

• Scientific notation: 1.28789472 × 10⁸

Factors of 128789472

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 4512

Divisors of 128789472

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 3 4 6 7 8 12 14 16 21 24 28 32 42 43 48 56 84 86 96 112 129 168 172 224 258 301 336 344 516 602 672 688 903 1032 1204 1376 1806 2064 2408 3612 4128 4457 4816 7224 8914 9632 13371 14448 17828 26742 28896 31199 35656 53484 62398 71312 93597 106968 124796 142624 187194 191651 213936 249592 374388 383302 427872 499184 574953 748776 766604 998368 1149906 1341557 1497552 1533208 2299812 2683114 2995104 3066416 4024671 4599624 5366228 6132832 8049342 9199248 10732456 16098684 18398496 21464912 32197368 42929824 64394736 128789472
• Sum of all divisors σ(n): 395442432
• Sum of proper divisors (its aliquot sum) s(n): 266652960
• 128789472 is an abundant number, because the sum of its proper divisors (266652960) is greater than itself. Its abundance is 137863488

Bases of 128789472

• Binary: 111101011010010101111100000₂
• Hexadecimal: 0x7AD2BE0
• Base-36: 24OELC

Squares and roots of 128789472

• 128789472 squared (128789472²) is 16586728098038784
• 128789472 cubed (128789472³) is 2136195953953979226882048
• The square root of 128789472 is 11348.5449287563
• The cube root of 128789472 is 505.0024141309

Scales and comparisons

• 128,789,472 seconds is equal to 4 years, 4 weeks, 6 days, 14 hours, 51 minutes, 12 seconds.
• To count from 1 to 128,789,472 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 128789472 cubic inches would be around 42.1 feet tall.

Recreational maths with 128789472

• 128789472 backwards is 274987821
• 128789472 is a Harshad number.
• The number of decimal digits it has is: 9
• The sum of 128789472's digits is 48
• More coming soon!