30940728

Names of 30940728

• Cardinal: 30940728 can be written as Thirty million, nine hundred forty thousand, seven hundred twenty-eight.

Scientific notation

• Scientific notation: 3.0940728 × 10⁷

Factors of 30940728

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 513

Divisors of 30940728

• Number of divisors d(n): 128
• Complete list of divisors:
  1 2 3 4 6 7 8 12 13 14 21 24 26 28 31 39 42 52 56 62 78 84 91 93 104 124 156 168 182 186 217 248 273 312 364 372 403 434 457 546 651 728 744 806 868 914 1092 1209 1302 1371 1612 1736 1828 2184 2418 2604 2742 2821 3199 3224 3656 4836 5208 5484 5642 5941 6398 8463 9597 9672 10968 11284 11882 12796 14167 16926 17823 19194 22568 23764 25592 28334 33852 35646 38388 41587 42501 47528 56668 67704 71292 76776 83174 85002 99169 113336 124761 142584 166348 170004 184171 198338 249522 297507 332696 340008 368342 396676 499044 552513 595014 736684 793352 998088 1105026 1190028 1289197 1473368 2210052 2380056 2578394 3867591 4420104 5156788 7735182 10313576 15470364 30940728
• Sum of all divisors σ(n): 98488320
• Sum of proper divisors (its aliquot sum) s(n): 67547592
• 30940728 is an abundant number, because the sum of its proper divisors (67547592) is greater than itself. Its abundance is 36606864

Bases of 30940728

• Binary: 1110110000001111000111000₂
• Hexadecimal: 0x1D81E38
• Base-36: IF60O

Squares and roots of 30940728

• 30940728 squared (30940728²) is 957328649169984
• 30940728 cubed (30940728³) is 29620445340575900708352
• The square root of 30940728 is 5562.4390333737
• The cube root of 30940728 is 313.9377268423

Scales and comparisons

• 30,940,728 seconds is equal to 51 weeks, 1 day, 2 hours, 38 minutes, 48 seconds.
• To count from 1 to 30,940,728 would take you about twenty-four 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 30940728 cubic inches would be around 26.2 feet tall.

Recreational maths with 30940728

• 30940728 backwards is 82704903
• The number of decimal digits it has is: 8
• The sum of 30940728's digits is 33
• More coming soon!