28115220

Names of 28115220

• Cardinal: 28115220 can be written as Twenty-eight million, one hundred fifteen thousand, two hundred twenty.

Scientific notation

• Scientific notation: 2.811522 × 10⁷

Factors of 28115220

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 221

Divisors of 28115220

• Number of divisors d(n): 144
• Complete list of divisors:
  1 2 3 4 5 6 7 10 12 14 15 20 21 28 30 35 42 49 60 70 73 84 98 105 131 140 146 147 196 210 219 245 262 292 294 365 393 420 438 490 511 524 588 655 730 735 786 876 917 980 1022 1095 1310 1460 1470 1533 1572 1834 1965 2044 2190 2555 2620 2751 2940 3066 3577 3668 3930 4380 4585 5110 5502 6132 6419 7154 7665 7860 9170 9563 10220 10731 11004 12838 13755 14308 15330 17885 18340 19126 19257 21462 25676 27510 28689 30660 32095 35770 38252 38514 42924 47815 53655 55020 57378 64190 66941 71540 77028 95630 96285 107310 114756 128380 133882 143445 191260 192570 200823 214620 267764 286890 334705 385140 401646 468587 573780 669410 803292 937174 1004115 1338820 1405761 1874348 2008230 2342935 2811522 4016460 4685870 5623044 7028805 9371740 14057610 28115220
• Sum of all divisors σ(n): 93538368
• Sum of proper divisors (its aliquot sum) s(n): 65423148
• 28115220 is an abundant number, because the sum of its proper divisors (65423148) is greater than itself. Its abundance is 37307928

Bases of 28115220

• Binary: 1101011010000000100010100₂
• Hexadecimal: 0x1AD0114
• Base-36: GQLUC

Squares and roots of 28115220

• 28115220 squared (28115220²) is 790465595648400
• 28115220 cubed (28115220³) is 22224114124085808648000
• The square root of 28115220 is 5302.3787114839
• The cube root of 28115220 is 304.0748459525

Scales and comparisons

• 28,115,220 seconds is equal to 46 weeks, 3 days, 9 hours, 47 minutes.
• To count from 1 to 28,115,220 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 28115220 cubic inches would be around 25.3 feet tall.

Recreational maths with 28115220

• 28115220 backwards is 02251182
• 28115220 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 28115220's digits is 21
• More coming soon!