636046220 has 48 divisors (see below), whose sum is σ = 1387266048. Its totient is φ = 244697280.

The previous prime is 636046219. The next prime is 636046247. The reversal of 636046220 is 22640636.

636046220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100469 + ... + 106611.

It is an arithmetic number, because the mean of its divisors is an integer number (28901376).

Almost surely, 2^636046220 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 636046220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (693633024).

636046220 is an abundant number, since it is smaller than the sum of its proper divisors (751219828).

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

636046220 is a wasteful number, since it uses less digits than its factorization.

636046220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6350 (or 6348 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 636046220 is about 25219.9567802960. The cubic root of 636046220 is about 859.9955921894.

Adding to 636046220 its reverse (22640636), we get a palindrome (658686856).

The spelling of 636046220 in words is "six hundred thirty-six million, forty-six thousand, two hundred twenty".