128389632

Names of 128389632

• Cardinal: 128389632 can be written as One hundred twenty-eight million, three hundred eighty-nine thousand, six hundred thirty-two.

Scientific notation

• Scientific notation: 1.28389632 × 10⁸

Factors of 128389632

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 11953

Divisors of 128389632

• Number of divisors d(n): 80
• Complete list of divisors:
  1 2 3 4 6 7 8 12 14 16 21 24 28 32 42 48 56 64 84 96 112 128 168 192 224 256 336 384 448 512 672 768 896 1344 1536 1792 2688 3584 5376 10752 11941 23882 35823 47764 71646 83587 95528 143292 167174 191056 250761 286584 334348 382112 501522 573168 668696 764224 1003044 1146336 1337392 1528448 2006088 2292672 2674784 3056896 4012176 4585344 5349568 6113792 8024352 9170688 10699136 16048704 18341376 21398272 32097408 42796544 64194816 128389632
• Sum of all divisors σ(n): 390933312
• Sum of proper divisors (its aliquot sum) s(n): 262543680
• 128389632 is an abundant number, because the sum of its proper divisors (262543680) is greater than itself. Its abundance is 134154048

Bases of 128389632

• Binary: 111101001110001001000000000₂
• Hexadecimal: 0x7A71200
• Base-36: 24FU2O

Squares and roots of 128389632

• 128389632 squared (128389632²) is 16483897605095424
• 128389632 cubed (128389632³) is 2116361547443882812243968
• The square root of 128389632 is 11330.9148792143
• The cube root of 128389632 is 504.4792619305

Scales and comparisons

• 128,389,632 seconds is equal to 4 years, 4 weeks, 1 day, 23 hours, 47 minutes, 12 seconds.
• To count from 1 to 128,389,632 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 128389632 cubic inches would be around 42 feet tall.

Recreational maths with 128389632

• 128389632 backwards is 236983821
• 128389632 is a Harshad number.
• The number of decimal digits it has is: 9
• The sum of 128389632's digits is 42
• More coming soon!