28732720

Names of 28732720

• Cardinal: 28732720 can be written as Twenty-eight million, seven hundred thirty-two thousand, seven hundred twenty.

Scientific notation

• Scientific notation: 2.873272 × 10⁷

Factors of 28732720

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 632

Divisors of 28732720

• Number of divisors d(n): 80
• Complete list of divisors:
  1 2 4 5 8 10 16 17 20 34 37 40 68 74 80 85 136 148 170 185 272 296 340 370 571 592 629 680 740 1142 1258 1360 1480 2284 2516 2855 2960 3145 4568 5032 5710 6290 9136 9707 10064 11420 12580 19414 21127 22840 25160 38828 42254 45680 48535 50320 77656 84508 97070 105635 155312 169016 194140 211270 338032 359159 388280 422540 718318 776560 845080 1436636 1690160 1795795 2873272 3591590 5746544 7183180 14366360 28732720
• Sum of all divisors σ(n): 72772128
• Sum of proper divisors (its aliquot sum) s(n): 44039408
• 28732720 is an abundant number, because the sum of its proper divisors (44039408) is greater than itself. Its abundance is 15306688

Bases of 28732720

• Binary: 1101101100110110100110000₂
• Hexadecimal: 0x1B66D30
• Base-36: H3UB4

Squares and roots of 28732720

• 28732720 squared (28732720²) is 825569198598400
• 28732720 cubed (28732720³) is 23720848623952219648000
• The square root of 28732720 is 5360.2910368747
• The cube root of 28732720 is 306.2848956489

Scales and comparisons

• 28,732,720 seconds is equal to 47 weeks, 3 days, 13 hours, 18 minutes, 40 seconds.
• To count from 1 to 28,732,720 would take you about nineteen 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 28732720 cubic inches would be around 25.5 feet tall.

Recreational maths with 28732720

• 28732720 backwards is 02723782
• The number of decimal digits it has is: 8
• The sum of 28732720's digits is 31
• More coming soon!