205798 has 8 divisors (see below), whose sum is σ = 316008. Its totient is φ = 100464.

The previous prime is 205783. The next prime is 205817. The reversal of 205798 is 897502.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1111 + ... + 1282.

It is an arithmetic number, because the mean of its divisors is an integer number (39501).

2²⁰⁵⁷⁹⁸ is an apocalyptic number.

205798 is a deficient number, since it is larger than the sum of its proper divisors (110210).

205798 is a wasteful number, since it uses less digits than its factorization.

205798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2438.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 205798 is about 453.6496445496. The cubic root of 205798 is about 59.0400953159.

The spelling of 205798 in words is "two hundred five thousand, seven hundred ninety-eight".