636206 has 4 divisors (see below), whose sum is σ = 954312. Its totient is φ = 318102.

The previous prime is 636193. The next prime is 636211. The reversal of 636206 is 602636.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 636206.

It is an unprimeable number.

636206 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159050 + ... + 159053.

It is an arithmetic number, because the mean of its divisors is an integer number (238578).

2⁶³⁶²⁰⁶ is an apocalyptic number.

636206 is a deficient number, since it is larger than the sum of its proper divisors (318106).

636206 is a wasteful number, since it uses less digits than its factorization.

636206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318105.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 636206 is about 797.6252252781. The cubic root of 636206 is about 86.0067598797.

The spelling of 636206 in words is "six hundred thirty-six thousand, two hundred six".