30686838

Names of 30686838

• Cardinal: 30686838 can be written as Thirty million, six hundred eighty-six thousand, eight hundred thirty-eight.

Scientific notation

• Scientific notation: 3.0686838 × 10⁷

Factors of 30686838

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 93

Divisors of 30686838

• Number of divisors d(n): 128
• Complete list of divisors:
  1 2 3 6 7 13 14 21 26 31 37 39 42 49 62 74 78 91 93 98 111 147 182 186 217 222 259 273 294 343 403 434 481 518 546 637 651 686 777 806 962 1029 1147 1209 1274 1302 1443 1519 1554 1813 1911 2058 2294 2418 2821 2886 3038 3367 3441 3626 3822 4459 4557 5439 5642 6734 6882 8029 8463 8918 9114 10101 10633 10878 12691 13377 14911 16058 16926 19747 20202 21266 23569 24087 25382 26754 29822 31899 38073 39494 44733 47138 48174 56203 59241 63798 70707 76146 89466 104377 112406 118482 138229 141414 164983 168609 208754 276458 313131 329966 337218 393421 414687 494949 626262 730639 786842 829374 989898 1180263 1461278 2191917 2360526 4383834 5114473 10228946 15343419 30686838
• Sum of all divisors σ(n): 81715200
• Sum of proper divisors (its aliquot sum) s(n): 51028362
• 30686838 is an abundant number, because the sum of its proper divisors (51028362) is greater than itself. Its abundance is 20341524

Bases of 30686838

• Binary: 1110101000011111001110110₂
• Hexadecimal: 0x1D43E76
• Base-36: I9Q46

Squares and roots of 30686838

• 30686838 squared (30686838²) is 941682026438244
• 30686838 cubed (30686838³) is 28897243792822110632472
• The square root of 30686838 is 5539.5701999343
• The cube root of 30686838 is 313.0766755437

Scales and comparisons

• 30,686,838 seconds is equal to 50 weeks, 5 days, 4 hours, 7 minutes, 18 seconds.
• To count from 1 to 30,686,838 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 30686838 cubic inches would be around 26.1 feet tall.

Recreational maths with 30686838

• 30686838 backwards is 83868603
• 30686838 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 30686838's digits is 42
• More coming soon!