205438 has 8 divisors (see below), whose sum is σ = 313560. Its totient is φ = 100920.

The previous prime is 205433. The next prime is 205441. The reversal of 205438 is 834502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 753 + ... + 988.

It is an arithmetic number, because the mean of its divisors is an integer number (39195).

2²⁰⁵⁴³⁸ is an apocalyptic number.

205438 is a deficient number, since it is larger than the sum of its proper divisors (108122).

205438 is a wasteful number, since it uses less digits than its factorization.

205438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1802.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 205438 is about 453.2526889054. The cubic root of 205438 is about 59.0056491766.

The spelling of 205438 in words is "two hundred five thousand, four hundred thirty-eight".