28857920

Names of 28857920

• Cardinal: 28857920 can be written as Twenty-eight million, eight hundred fifty-seven thousand, nine hundred twenty.

Scientific notation

• Scientific notation: 2.885792 × 10⁷

Factors of 28857920

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 1018

Divisors of 28857920

• Number of divisors d(n): 112
• Complete list of divisors:
  1 2 4 5 7 8 10 13 14 16 20 26 28 32 35 40 52 56 64 65 70 80 91 104 112 130 140 160 182 208 224 260 280 320 364 416 448 455 520 560 728 832 910 991 1040 1120 1456 1820 1982 2080 2240 2912 3640 3964 4160 4955 5824 6937 7280 7928 9910 12883 13874 14560 15856 19820 25766 27748 29120 31712 34685 39640 51532 55496 63424 64415 69370 79280 90181 103064 110992 128830 138740 158560 180362 206128 221984 257660 277480 317120 360724 412256 443968 450905 515320 554960 721448 824512 901810 1030640 1109920 1442896 1803620 2061280 2219840 2885792 3607240 4122560 5771584 7214480 14428960 28857920
• Sum of all divisors σ(n): 84661248
• Sum of proper divisors (its aliquot sum) s(n): 55803328
• 28857920 is an abundant number, because the sum of its proper divisors (55803328) is greater than itself. Its abundance is 26945408

Bases of 28857920

• Binary: 1101110000101011001000000₂
• Hexadecimal: 0x1B85640
• Base-36: H6IWW

Squares and roots of 28857920

• 28857920 squared (28857920²) is 832779546726400
• 28857920 cubed (28857920³) is 24032285537066713088000
• The square root of 28857920 is 5371.9568129313
• The cube root of 28857920 is 306.7291198157

Scales and comparisons

• 28,857,920 seconds is equal to 47 weeks, 5 days, 5 minutes, 20 seconds.
• To count from 1 to 28,857,920 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 28857920 cubic inches would be around 25.6 feet tall.

Recreational maths with 28857920

• 28857920 backwards is 02975882
• The number of decimal digits it has is: 8
• The sum of 28857920's digits is 41
• More coming soon!