636500 has 48 divisors (see below), whose sum is σ = 1485120. Its totient is φ = 237600.

The previous prime is 636499. The next prime is 636533. The reversal of 636500 is 5636.

636500 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 (20).

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, 9467 + ... + 9533.

It is an arithmetic number, because the mean of its divisors is an integer number (30940).

2⁶³⁶⁵⁰⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 636500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (742560).

636500 is an abundant number, since it is smaller than the sum of its proper divisors (848620).

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

636500 is a wasteful number, since it uses less digits than its factorization.

636500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105 (or 93 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 636500 is about 797.8095010715. The cubic root of 636500 is about 86.0200061623.

The spelling of 636500 in words is "six hundred thirty-six thousand, five hundred".