28139200

Names of 28139200

• Cardinal: 28139200 can be written as Twenty-eight million, one hundred thirty-nine thousand, two hundred.

Scientific notation

• Scientific notation: 2.81392 × 10⁷

Factors of 28139200

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 459

Divisors of 28139200

• Number of divisors d(n): 84
• Complete list of divisors:
  1 2 4 5 8 10 16 20 25 32 40 43 50 64 80 86 100 160 172 200 215 320 344 400 409 430 688 800 818 860 1075 1376 1600 1636 1720 2045 2150 2752 3272 3440 4090 4300 6544 6880 8180 8600 10225 13088 13760 16360 17200 17587 20450 26176 32720 34400 35174 40900 65440 68800 70348 81800 87935 130880 140696 163600 175870 281392 327200 351740 439675 562784 654400 703480 879350 1125568 1406960 1758700 2813920 3517400 5627840 7034800 14069600 28139200
• Sum of all divisors σ(n): 71023480
• Sum of proper divisors (its aliquot sum) s(n): 42884280
• 28139200 is an abundant number, because the sum of its proper divisors (42884280) is greater than itself. Its abundance is 14745080

Bases of 28139200

• Binary: 1101011010101111011000000₂
• Hexadecimal: 0x1AD5EC0
• Base-36: GR4CG

Squares and roots of 28139200

• 28139200 squared (28139200²) is 791814576640000
• 28139200 cubed (28139200³) is 22281028734988288000000
• The square root of 28139200 is 5304.6394787959
• The cube root of 28139200 is 304.1612717711

Scales and comparisons

• 28,139,200 seconds is equal to 46 weeks, 3 days, 16 hours, 26 minutes, 40 seconds.
• To count from 1 to 28,139,200 would take you about seventeen 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 28139200 cubic inches would be around 25.3 feet tall.

Recreational maths with 28139200

• 28139200 backwards is 00293182
• 28139200 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 28139200's digits is 25
• More coming soon!