28979720

Names of 28979720

• Cardinal: 28979720 can be written as Twenty-eight million, nine hundred seventy-nine thousand, seven hundred twenty.

Scientific notation

• Scientific notation: 2.897972 × 10⁷

Factors of 28979720

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 122

Divisors of 28979720

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 4 5 7 8 10 11 14 20 22 28 35 40 44 55 56 70 77 88 97 110 140 154 194 220 280 308 385 388 440 485 616 679 770 776 970 1067 1358 1540 1940 2134 2716 3080 3395 3880 4268 5335 5432 6790 7469 8536 9409 10670 13580 14938 18818 21340 27160 29876 37345 37636 42680 47045 59752 65863 74690 75272 94090 103499 131726 149380 188180 206998 263452 298760 329315 376360 413996 517495 526904 658630 724493 827992 1034990 1317260 1448986 2069980 2634520 2897972 3622465 4139960 5795944 7244930 14489860 28979720
• Sum of all divisors σ(n): 82140480
• Sum of proper divisors (its aliquot sum) s(n): 53160760
• 28979720 is an abundant number, because the sum of its proper divisors (53160760) is greater than itself. Its abundance is 24181040

Bases of 28979720

• Binary: 1101110100011001000001000₂
• Hexadecimal: 0x1BA3208
• Base-36: H94W8

Squares and roots of 28979720

• 28979720 squared (28979720²) is 839824171278400
• 28979720 cubed (28979720³) is 24337869332880074048000
• The square root of 28979720 is 5383.2815270987
• The cube root of 28979720 is 307.1600491033

Scales and comparisons

• 28,979,720 seconds is equal to 47 weeks, 6 days, 9 hours, 55 minutes, 20 seconds.
• To count from 1 to 28,979,720 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 28979720 cubic inches would be around 25.6 feet tall.

Recreational maths with 28979720

• 28979720 backwards is 02797982
• 28979720 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 28979720's digits is 44
• More coming soon!