636042 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
2636042 is an apocalyptic number.
It is a practical number, because each smaller number is the sum of distinct divisors of 636042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (725760).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
636042 is a wasteful number, since it uses less digits than its factorization.
636042 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 458.
The square root of 636042 is about 797.5224134781. The cubic root of 636042 is about 85.9993690237. Note that the first 3 decimals are identical.
Adding to 636042 its reverse (240636), we get a palindrome (876678).
The spelling of 636042 in words is "six hundred thirty-six thousand, forty-two".