30138280

Names of 30138280

• Cardinal: 30138280 can be written as Thirty million, one hundred thirty-eight thousand, two hundred eighty.

Scientific notation

• Scientific notation: 3.013828 × 10⁷

Factors of 30138280

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 135

Divisors of 30138280

• Number of divisors d(n): 128
• Complete list of divisors:
  1 2 4 5 8 10 17 20 23 34 40 41 46 47 68 82 85 92 94 115 136 164 170 184 188 205 230 235 328 340 376 391 410 460 470 680 697 782 799 820 920 940 943 1081 1394 1564 1598 1640 1880 1886 1927 1955 2162 2788 3128 3196 3485 3772 3854 3910 3995 4324 4715 5405 5576 6392 6970 7544 7708 7820 7990 8648 9430 9635 10810 13940 15416 15640 15980 16031 18377 18860 19270 21620 27880 31960 32062 32759 36754 37720 38540 43240 44321 64124 65518 73508 77080 80155 88642 91885 128248 131036 147016 160310 163795 177284 183770 221605 262072 320620 327590 354568 367540 443210 641240 655180 735080 753457 886420 1310360 1506914 1772840 3013828 3767285 6027656 7534570 15069140 30138280
• Sum of all divisors σ(n): 78382080
• Sum of proper divisors (its aliquot sum) s(n): 48243800
• 30138280 is an abundant number, because the sum of its proper divisors (48243800) is greater than itself. Its abundance is 18105520

Bases of 30138280

• Binary: 1110010111101111110101000₂
• Hexadecimal: 0x1CBDFA8
• Base-36: HXYUG

Squares and roots of 30138280

• 30138280 squared (30138280²) is 908315921358400
• 30138280 cubed (30138280³) is 27375079566357439552000
• The square root of 30138280 is 5489.8342415777
• The cube root of 30138280 is 311.1999279677

Scales and comparisons

• 30,138,280 seconds is equal to 49 weeks, 5 days, 19 hours, 44 minutes, 40 seconds.
• To count from 1 to 30,138,280 would take you about twenty-two 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 30138280 cubic inches would be around 25.9 feet tall.

Recreational maths with 30138280

• 30138280 backwards is 08283103
• The number of decimal digits it has is: 8
• The sum of 30138280's digits is 25
• More coming soon!