205089856 has 28 divisors (see below), whose sum is σ = 421012620. Its totient is φ = 99008000.

The previous prime is 205089851. The next prime is 205089877. The reversal of 205089856 is 658980502.

It can be written as a sum of positive squares in 2 ways, for example, as 144000000 + 61089856 = 12000^2 + 7816^2 .

It is not an unprimeable number, because it can be changed into a prime (205089851) 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 3 ways as a sum of consecutive naturals, for example, 53395 + ... + 57106.

It is an arithmetic number, because the mean of its divisors is an integer number (15036165).

Almost surely, 2^205089856 is an apocalyptic number.

It is an amenable number.

205089856 is an abundant number, since it is smaller than the sum of its proper divisors (215922764).

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

205089856 is a wasteful number, since it uses less digits than its factorization.

205089856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110542 (or 110532 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 43.

The square root of 205089856 is about 14320.9586271311. The cubic root of 205089856 is about 589.7229916717.

The spelling of 205089856 in words is "two hundred five million, eighty-nine thousand, eight hundred fifty-six".