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808043908 = 227241193521
BaseRepresentation
bin110000001010011…
…100010110000100
32002022110212212011
4300022130112010
53123324401113
6212103104004
726011155100
oct6012342604
92068425764
10808043908
11385135391
121a6742004
13cb53b2b9
1479460900
154ae1563d
hex3029c584

808043908 has 72 divisors (see below), whose sum is σ = 1697049144. Its totient is φ = 335462400.

The previous prime is 808043893. The next prime is 808043909. The reversal of 808043908 is 809340808.

It can be written as a sum of positive squares in 4 ways, for example, as 14607684 + 793436224 = 3822^2 + 28168^2 .

It is not an unprimeable number, because it can be changed into a prime (808043909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1550688 + ... + 1551208.

It is an arithmetic number, because the mean of its divisors is an integer number (23570127).

Almost surely, 2808043908 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 808043908, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (848524572).

808043908 is an abundant number, since it is smaller than the sum of its proper divisors (889005236).

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

808043908 is a wasteful number, since it uses less digits than its factorization.

808043908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 773 (or 764 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 808043908 is about 28426.1131356364. The cubic root of 808043908 is about 931.4187725401.

The spelling of 808043908 in words is "eight hundred eight million, forty-three thousand, nine hundred eight".

Divisors: 1 2 4 7 14 28 41 49 82 98 164 193 196 287 386 521 574 772 1042 1148 1351 2009 2084 2702 3647 4018 5404 7294 7913 8036 9457 14588 15826 18914 21361 25529 31652 37828 42722 51058 55391 85444 100553 102116 110782 149527 201106 221564 299054 387737 402212 598108 703871 775474 1046689 1407742 1550948 2093378 2815484 4122673 4186756 4927097 8245346 9854194 16490692 19708388 28858711 57717422 115434844 202010977 404021954 808043908