206436 has 12 divisors (see below), whose sum is σ = 481712. Its totient is φ = 68808.

The previous prime is 206419. The next prime is 206447. The reversal of 206436 is 634602.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

206436 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8590 + ... + 8613.

2²⁰⁶⁴³⁶ is an apocalyptic number.

It is an amenable number.

206436 is an abundant number, since it is smaller than the sum of its proper divisors (275276).

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

206436 is a wasteful number, since it uses less digits than its factorization.

206436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17210 (or 17208 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 206436 is about 454.3522862273. The cubic root of 206436 is about 59.1010429814.

The spelling of 206436 in words is "two hundred six thousand, four hundred thirty-six".