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2008308105 = 325109409441
BaseRepresentation
bin111011110110100…
…0101100110001001
312011221222121210200
41313231011212021
513103111324410
6531141002413
7100524223446
oct16755054611
95157877720
102008308105
11940701671
124806b3409
132600c5abb
14150a1c9cd
15bb4a43c0
hex77b45989

2008308105 has 24 divisors (see below), whose sum is σ = 3513012360. Its totient is φ = 1061268480.

The previous prime is 2008308103. The next prime is 2008308109. The reversal of 2008308105 is 5018038002.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 94070601 + 1914237504 = 9699^2 + 43752^2 .

It is not a de Polignac number, because 2008308105 - 21 = 2008308103 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2008308103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 199816 + ... + 209625.

It is an arithmetic number, because the mean of its divisors is an integer number (146375515).

Almost surely, 22008308105 is an apocalyptic number.

It is an amenable number.

2008308105 is a deficient number, since it is larger than the sum of its proper divisors (1504704255).

2008308105 is a wasteful number, since it uses less digits than its factorization.

2008308105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409561 (or 409558 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 2008308105 is about 44814.1507227349. The cubic root of 2008308105 is about 1261.6632324736.

The spelling of 2008308105 in words is "two billion, eight million, three hundred eight thousand, one hundred five".

Divisors: 1 3 5 9 15 45 109 327 545 981 1635 4905 409441 1228323 2047205 3684969 6141615 18424845 44629069 133887207 223145345 401661621 669436035 2008308105