636090552 has 96 divisors (see below), whose sum is σ = 1748073600. Its totient is φ = 208942848.

The previous prime is 636090551. The next prime is 636090557. The reversal of 636090552 is 255090636.

It is a super-2 number, since 2×636090552² = 809222380687329408, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (636090551) 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 23 ways as a sum of consecutive naturals, for example, 2777574 + ... + 2777802.

It is an arithmetic number, because the mean of its divisors is an integer number (18209100).

Almost surely, 2^636090552 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 636090552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (874036800).

636090552 is an abundant number, since it is smaller than the sum of its proper divisors (1111983048).

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

636090552 is a wasteful number, since it uses less digits than its factorization.

636090552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637 (or 630 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 36.

The square root of 636090552 is about 25220.8356721184. The cubic root of 636090552 is about 860.0155720995.

The spelling of 636090552 in words is "six hundred thirty-six million, ninety thousand, five hundred fifty-two".