636732 has 36 divisors (see below), whose sum is σ = 1681680. Its totient is φ = 202752.

The previous prime is 636731. The next prime is 636739. The reversal of 636732 is 237636.

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 636696 and 636705.

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 636732.

It is not an unprimeable number, because it can be changed into a prime (636731) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 444 + ... + 1212.

2⁶³⁶⁷³² 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 636732, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (840840).

636732 is an abundant number, since it is smaller than the sum of its proper divisors (1044948).

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

636732 is a wasteful number, since it uses less digits than its factorization.

636732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 802 (or 797 counting only the distinct ones).

The product of its digits is 4536, while the sum is 27.

The square root of 636732 is about 797.9548859428. The cubic root of 636732 is about 86.0304561320.

The spelling of 636732 in words is "six hundred thirty-six thousand, seven hundred thirty-two".