636906 has 16 divisors (see below), whose sum is σ = 1287648. Its totient is φ = 210000.

The previous prime is 636877. The next prime is 636917. The reversal of 636906 is 609636.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81 + ... + 1131.

It is an arithmetic number, because the mean of its divisors is an integer number (80478).

2⁶³⁶⁹⁰⁶ is an apocalyptic number.

636906 is an abundant number, since it is smaller than the sum of its proper divisors (650742).

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

636906 is a wasteful number, since it uses less digits than its factorization.

636906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1157.

The product of its (nonzero) digits is 5832, while the sum is 30.

The square root of 636906 is about 798.0639072155. The cubic root of 636906 is about 86.0382919436.

The spelling of 636906 in words is "six hundred thirty-six thousand, nine hundred six".