28429947

Names of 28429947

• Cardinal: 28429947 can be written as Twenty-eight million, four hundred twenty-nine thousand, nine hundred forty-seven.

Scientific notation

• Scientific notation: 2.8429947 × 10⁷

Factors of 28429947

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 71

Divisors of 28429947

• Number of divisors d(n): 120
• Complete list of divisors:
  1 3 7 9 13 19 21 27 29 39 49 57 63 81 87 91 117 133 147 171 189 203 247 261 273 351 377 399 441 513 551 567 609 637 741 783 819 931 1053 1131 1197 1323 1421 1539 1653 1729 1827 1911 2223 2349 2457 2639 2793 3393 3591 3857 3969 4263 4959 5187 5481 5733 6669 7163 7371 7917 8379 10179 10773 11571 12103 12789 14877 15561 16443 17199 18473 20007 21489 23751 25137 26999 30537 34713 36309 38367 44631 46683 50141 51597 55419 64467 71253 75411 80997 104139 108927 115101 140049 150423 166257 193401 213759 242991 312417 326781 350987 451269 498771 580203 728973 980343 1052961 1353807 1496313 2186919 3158883 4061421 9476649 28429947
• Sum of all divisors σ(n): 57934800
• Sum of proper divisors (its aliquot sum) s(n): 29504853
• 28429947 is an abundant number, because the sum of its proper divisors (29504853) is greater than itself. Its abundance is 1074906

Bases of 28429947

• Binary: 1101100011100111001111011₂
• Hexadecimal: 0x1B1CE7B
• Base-36: GXCOR

Squares and roots of 28429947

• 28429947 squared (28429947²) is 808261886422809
• 28429947 cubed (28429947³) is 22978842593120479461123
• The square root of 28429947 is 5331.9740246929
• The cube root of 28429947 is 305.2052618123

Scales and comparisons

• 28,429,947 seconds is equal to 47 weeks, 1 hour, 12 minutes, 27 seconds.
• To count from 1 to 28,429,947 would take you about eighteen 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 28429947 cubic inches would be around 25.4 feet tall.

Recreational maths with 28429947

• 28429947 backwards is 74992482
• The number of decimal digits it has is: 8
• The sum of 28429947's digits is 45
• More coming soon!