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68105118 = 2371915787
BaseRepresentation
bin1000000111100…
…11001110011110
311202011002122210
410003303032132
5114413330433
610431421250
71454612124
oct403631636
9152132583
1068105118
1135497424
121a984826
13111571b3
14908b914
155ea4463
hex40f339e

68105118 has 16 divisors (see below), whose sum is σ = 136408320. Its totient is φ = 22668696.

The previous prime is 68105113. The next prime is 68105119. The reversal of 68105118 is 81150186.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68105113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3580 + ... + 12207.

It is an arithmetic number, because the mean of its divisors is an integer number (8525520).

Almost surely, 268105118 is an apocalyptic number.

68105118 is an abundant number, since it is smaller than the sum of its proper divisors (68303202).

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

68105118 is a wasteful number, since it uses less digits than its factorization.

68105118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16511.

The product of its (nonzero) digits is 1920, while the sum is 30.

The square root of 68105118 is about 8252.5825048890. The cubic root of 68105118 is about 408.3757231943.

The spelling of 68105118 in words is "sixty-eight million, one hundred five thousand, one hundred eighteen".

Divisors: 1 2 3 6 719 1438 2157 4314 15787 31574 47361 94722 11350853 22701706 34052559 68105118