636006 has 32 divisors (see below), whose sum is σ = 1532160. Its totient is φ = 171936.

The previous prime is 635989. The next prime is 636017. The reversal of 636006 is 600636.

636006 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 400 + ... + 1196.

It is an arithmetic number, because the mean of its divisors is an integer number (47880).

2⁶³⁶⁰⁰⁶ is an apocalyptic number.

It is a pronic number, being equal to 797×798.

It is a practical number, because each smaller number is the sum of distinct divisors of 636006, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (766080).

636006 is an abundant number, since it is smaller than the sum of its proper divisors (896154).

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

636006 is a wasteful number, since it uses less digits than its factorization.

636006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 828.

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 636006 is about 797.4998432602. The cubic root of 636006 is about 85.9977464706.

The spelling of 636006 in words is "six hundred thirty-six thousand, six".