205388 has 6 divisors (see below), whose sum is σ = 359436. Its totient is φ = 102692.

The previous prime is 205357. The next prime is 205391. The reversal of 205388 is 883502.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 205388.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25670 + ... + 25677.

It is an arithmetic number, because the mean of its divisors is an integer number (59906).

2²⁰⁵³⁸⁸ is an apocalyptic number.

It is an amenable number.

205388 is a deficient number, since it is larger than the sum of its proper divisors (154048).

205388 is a wasteful number, since it uses less digits than its factorization.

205388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51351 (or 51349 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 205388 is about 453.1975286782. The cubic root of 205388 is about 59.0008618087. Note that the first 3 decimals are identical.

The spelling of 205388 in words is "two hundred five thousand, three hundred eighty-eight".