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205808 = 2419677
BaseRepresentation
bin110010001111110000
3101110022112
4302033300
523041213
64224452
71515011
oct621760
9343275
10205808
11130699
129b128
13728a5
1455008
1540ea8
hex323f0

205808 has 20 divisors (see below), whose sum is σ = 420360. Its totient is φ = 97344.

The previous prime is 205783. The next prime is 205817. The reversal of 205808 is 808502.

205808 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35 + ... + 642.

It is an arithmetic number, because the mean of its divisors is an integer number (21018).

2205808 is an apocalyptic number.

It is an amenable number.

205808 is an abundant number, since it is smaller than the sum of its proper divisors (214552).

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

205808 is a wasteful number, since it uses less digits than its factorization.

205808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 704 (or 698 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 205808 is about 453.6606661371. The cubic root of 205808 is about 59.0410515795.

The spelling of 205808 in words is "two hundred five thousand, eight hundred eight".

Divisors: 1 2 4 8 16 19 38 76 152 304 677 1354 2708 5416 10832 12863 25726 51452 102904 205808