128000000

Names of 128000000

• Cardinal: 128000000 can be written as One hundred twenty-eight million.

Scientific notation

• Scientific notation: 1.28 × 10⁸

Factors of 128000000

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 19
• Sum of prime factors: 7

Divisors of 128000000

• Number of divisors d(n): 98
• Complete list of divisors:
  1 2 4 5 8 10 16 20 25 32 40 50 64 80 100 125 128 160 200 250 256 320 400 500 512 625 640 800 1000 1024 1250 1280 1600 2000 2048 2500 2560 3125 3200 4000 4096 5000 5120 6250 6400 8000 8192 10000 10240 12500 12800 15625 16000 20000 20480 25000 25600 31250 32000 40000 40960 50000 51200 62500 64000 80000 100000 102400 125000 128000 160000 200000 204800 250000 256000 320000 400000 500000 512000 640000 800000 1000000 1024000 1280000 1600000 2000000 2560000 3200000 4000000 5120000 6400000 8000000 12800000 16000000 25600000 32000000 64000000 128000000
• Sum of all divisors σ(n): 319976373
• Sum of proper divisors (its aliquot sum) s(n): 191976373
• 128000000 is an abundant number, because the sum of its proper divisors (191976373) is greater than itself. Its abundance is 63976373

Bases of 128000000

• Binary: 111101000010010000000000000₂
• Hexadecimal: 0x7A12000
• Base-36: 247HFK

Squares and roots of 128000000

• 128000000 squared (128000000²) is 16384000000000000
• 128000000 cubed (128000000³) is 2097152000000000000000000
• The square root of 128000000 is 11313.7084989845
• The cube root of 128000000 is 503.9684199581
• Being both a perfect square and a perfect cube, 128000000 is also a perfect sixth number.

Scales and comparisons

• 128,000,000 seconds is equal to 4 years, 3 weeks, 4 days, 11 hours, 33 minutes, 20 seconds.
• To count from 1 to 128,000,000 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 128000000 cubic inches would be around 42 feet tall.

Recreational maths with 128000000

• 128000000 backwards is 000000821
• The number of decimal digits it has is: 9
• The sum of 128000000's digits is 11
• More coming soon!