636347604 has 48 divisors (see below), whose sum is σ = 1576713600. Its totient is φ = 199059456.

The previous prime is 636347603. The next prime is 636347623. The reversal of 636347604 is 406743636.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (636347603) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 68892 + ... + 77580.

It is an arithmetic number, because the mean of its divisors is an integer number (32848200).

Almost surely, 2^636347604 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 636347604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (788356800).

636347604 is an abundant number, since it is smaller than the sum of its proper divisors (940365996).

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

636347604 is a wasteful number, since it uses less digits than its factorization.

636347604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9072 (or 9070 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 39.

The square root of 636347604 is about 25225.9311820198. The cubic root of 636347604 is about 860.1314041143.

The spelling of 636347604 in words is "six hundred thirty-six million, three hundred forty-seven thousand, six hundred four".