12145728

Names of 12145728

• Cardinal: 12145728 can be written as Twelve million, one hundred forty-five thousand, seven hundred twenty-eight.

Scientific notation

• Scientific notation: 1.2145728 × 10⁷

Factors of 12145728

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 1303

Divisors of 12145728

• Number of divisors d(n): 84
• Complete list of divisors:
  1 2 3 4 6 7 8 12 14 16 21 24 28 32 42 48 49 56 64 84 96 98 112 147 168 192 196 224 294 336 392 448 588 672 784 1176 1291 1344 1568 2352 2582 3136 3873 4704 5164 7746 9037 9408 10328 15492 18074 20656 27111 30984 36148 41312 54222 61968 63259 72296 82624 108444 123936 126518 144592 189777 216888 247872 253036 289184 379554 433776 506072 578368 759108 867552 1012144 1518216 1735104 2024288 3036432 4048576 6072864 12145728
• Sum of all divisors σ(n): 37411152
• Sum of proper divisors (its aliquot sum) s(n): 25265424
• 12145728 is an abundant number, because the sum of its proper divisors (25265424) is greater than itself. Its abundance is 13119696

Bases of 12145728

• Binary: 101110010101010001000000₂
• Hexadecimal: 0xB95440
• Base-36: 78BPC

Squares and roots of 12145728

• 12145728 squared (12145728²) is 147518708649984
• 12145728 cubed (12145728³) is 1791722110173952868352
• The square root of 12145728 is 3485.0721656803
• The cube root of 12145728 is 229.8658827415

Scales and comparisons

• 12,145,728 seconds is equal to 20 weeks, 13 hours, 48 minutes, 48 seconds.
• To count from 1 to 12,145,728 would take you about thirty weeks!

  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 12145728 cubic inches would be around 19.2 feet tall.

Recreational maths with 12145728

• 12145728 backwards is 82754121
• The number of decimal digits it has is: 8
• The sum of 12145728's digits is 30
• More coming soon!