205996 has 18 divisors (see below), whose sum is σ = 419748. Its totient is φ = 88200.

The previous prime is 205993. The next prime is 206009. The reversal of 205996 is 699502.

It is a super-3 number, since 3×205996³ = 26223920333663808, which contains 333 as substring.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (205991) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 330 + ... + 721.

2²⁰⁵⁹⁹⁶ is an apocalyptic number.

It is an amenable number.

205996 is an abundant number, since it is smaller than the sum of its proper divisors (213752).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

205996 is a wasteful number, since it uses less digits than its factorization.

205996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1069 (or 1060 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 205996 is about 453.8678221685. The cubic root of 205996 is about 59.0590235722.

The spelling of 205996 in words is "two hundred five thousand, nine hundred ninety-six".