205828087 has 16 divisors (see below), whose sum is σ = 215188992. Its totient is φ = 196732800.

The previous prime is 205828037. The next prime is 205828111. The reversal of 205828087 is 780828502.

It is a cyclic number.

It is not a de Polignac number, because 205828087 - 2¹¹ = 205826039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205828037) 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 15 ways as a sum of consecutive naturals, for example, 513087 + ... + 513487.

It is an arithmetic number, because the mean of its divisors is an integer number (13449312).

Almost surely, 2^205828087 is an apocalyptic number.

205828087 is a deficient number, since it is larger than the sum of its proper divisors (9360905).

205828087 is a wasteful number, since it uses less digits than its factorization.

205828087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678.

The product of its (nonzero) digits is 71680, while the sum is 40.

The square root of 205828087 is about 14346.7099712791. The cubic root of 205828087 is about 590.4297233254.

The spelling of 205828087 in words is "two hundred five million, eight hundred twenty-eight thousand, eighty-seven".