636531952 has 120 divisors (see below), whose sum is σ = 1533558096. Its totient is φ = 254306304.

The previous prime is 636531911. The next prime is 636531983. The reversal of 636531952 is 259135636.

It is a happy number.

636531952 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2172318 + ... + 2172610.

Almost surely, 2^636531952 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 636531952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (766779048).

636531952 is an abundant number, since it is smaller than the sum of its proper divisors (897026144).

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

636531952 is a wasteful number, since it uses less digits than its factorization.

636531952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495 (or 482 counting only the distinct ones).

The product of its digits is 145800, while the sum is 40.

The square root of 636531952 is about 25229.5848558790. The cubic root of 636531952 is about 860.2144552610.

The spelling of 636531952 in words is "six hundred thirty-six million, five hundred thirty-one thousand, nine hundred fifty-two".