636552 has 64 divisors (see below), whose sum is σ = 2025600. Its totient is φ = 181440.

The previous prime is 636547. The next prime is 636553. The reversal of 636552 is 255636.

636552 is a `hidden beast` number, since 6 + 3 + 655 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (636553) by changing a digit.

636552 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1302 + ... + 1722.

It is an arithmetic number, because the mean of its divisors is an integer number (31650).

2⁶³⁶⁵⁵² 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 636552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1012800).

636552 is an abundant number, since it is smaller than the sum of its proper divisors (1389048).

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

636552 is a wasteful number, since it uses less digits than its factorization.

636552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443 (or 433 counting only the distinct ones).

The product of its digits is 5400, while the sum is 27.

The square root of 636552 is about 797.8420896393. The cubic root of 636552 is about 86.0223486176.

The spelling of 636552 in words is "six hundred thirty-six thousand, five hundred fifty-two".