636959952 has 90 divisors (see below), whose sum is σ = 1881515922. Its totient is φ = 201128832.

The previous prime is 636959941. The next prime is 636960013. The reversal of 636959952 is 259959636.

It can be written as a sum of positive squares in only one way, i.e., 540841536 + 96118416 = 23256^2 + 9804^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 45858 + ... + 58110.

Almost surely, 2^636959952 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 636959952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (940757961).

636959952 is an abundant number, since it is smaller than the sum of its proper divisors (1244555970).

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

636959952 is a wasteful number, since it uses less digits than its factorization.

636959952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12305 (or 12277 counting only the distinct ones).

The product of its digits is 3936600, while the sum is 54.

The square root of 636959952 is about 25238.0655360113. The cubic root of 636959952 is about 860.4072129578.

The spelling of 636959952 in words is "six hundred thirty-six million, nine hundred fifty-nine thousand, nine hundred fifty-two".