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68868765 = 3357229359
BaseRepresentation
bin1000001101011…
…01101010011101
311210120220012000
410012231222131
5120112300030
610500032513
71464242400
oct406555235
9153526160
1068868765
1135969139
121b092739
1311363964
149209d37
1560a5860
hex41ada9d

68868765 has 96 divisors (see below), whose sum is σ = 147744000. Its totient is φ = 30312576.

The previous prime is 68868733. The next prime is 68868791. The reversal of 68868765 is 56786886.

It is not a de Polignac number, because 68868765 - 25 = 68868733 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 191656 + ... + 192014.

It is an arithmetic number, because the mean of its divisors is an integer number (1539000).

Almost surely, 268868765 is an apocalyptic number.

It is an amenable number.

68868765 is an abundant number, since it is smaller than the sum of its proper divisors (78875235).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68868765 is a wasteful number, since it uses less digits than its factorization.

68868765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416 (or 403 counting only the distinct ones).

The product of its digits is 3870720, while the sum is 54.

The square root of 68868765 is about 8298.7206845393. The cubic root of 68868765 is about 409.8963946028.

It can be divided in two parts, 6886 and 8765, that added together give a palindrome (15651).

The spelling of 68868765 in words is "sixty-eight million, eight hundred sixty-eight thousand, seven hundred sixty-five".

Divisors: 1 3 5 7 9 15 21 27 29 35 45 49 63 87 105 135 145 147 189 203 245 261 315 359 435 441 609 735 783 945 1015 1077 1305 1323 1421 1795 1827 2205 2513 3045 3231 3915 4263 5385 5481 6615 7105 7539 9135 9693 10411 12565 12789 16155 17591 21315 22617 27405 31233 37695 38367 48465 52055 52773 63945 67851 72877 87955 93699 113085 156165 158319 191835 218631 263865 281097 339255 364385 468495 474957 510139 655893 791595 1093155 1405485 1530417 1967679 2374785 2550695 3279465 4591251 7652085 9838395 13773753 22956255 68868765