636610422 has 64 divisors (see below), whose sum is σ = 1522197504. Its totient is φ = 173543040.

The previous prime is 636610411. The next prime is 636610427. The reversal of 636610422 is 224016636.

It is a self number, because there is not a number n which added to its sum of digits gives 636610422.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (636610427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 638028 + ... + 639024.

It is an arithmetic number, because the mean of its divisors is an integer number (23784336).

Almost surely, 2^636610422 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 636610422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (761098752).

636610422 is an abundant number, since it is smaller than the sum of its proper divisors (885587082).

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

636610422 is a wasteful number, since it uses less digits than its factorization.

636610422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1693.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 636610422 is about 25231.1399266858. The cubic root of 636610422 is about 860.2498021406.

The spelling of 636610422 in words is "six hundred thirty-six million, six hundred ten thousand, four hundred twenty-two".