205338889 has 16 divisors (see below), whose sum is σ = 241521280. Its totient is φ = 170916480.

The previous prime is 205338883. The next prime is 205338893. The reversal of 205338889 is 988833502.

It is a happy number.

It is not a de Polignac number, because 205338889 - 2¹¹ = 205336841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (205338883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52597 + ... + 56365.

It is an arithmetic number, because the mean of its divisors is an integer number (15095080).

Almost surely, 2^205338889 is an apocalyptic number.

It is an amenable number.

205338889 is a deficient number, since it is larger than the sum of its proper divisors (36182391).

205338889 is a wasteful number, since it uses less digits than its factorization.

205338889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4000.

The product of its (nonzero) digits is 414720, while the sum is 46.

The square root of 205338889 is about 14329.6506935794. The cubic root of 205338889 is about 589.9615880384.

The spelling of 205338889 in words is "two hundred five million, three hundred thirty-eight thousand, eight hundred eighty-nine".