636048384 has 88 divisors (see below), whose sum is σ = 1705527648. Its totient is φ = 210739200.

The previous prime is 636048383. The next prime is 636048419. The reversal of 636048384 is 483840636.

It is a super-2 number, since 2×636048384² = 809115093578022912, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (636048383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 604659 + ... + 605709.

It is an arithmetic number, because the mean of its divisors is an integer number (19380996).

Almost surely, 2^636048384 is an apocalyptic number.

636048384 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 636048384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (852763824).

636048384 is an abundant number, since it is smaller than the sum of its proper divisors (1069479264).

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

636048384 is a wasteful number, since it uses less digits than its factorization.

636048384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1271 (or 1253 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 42.

The square root of 636048384 is about 25219.9996827914. Note that the first 3 decimals coincide. The cubic root of 636048384 is about 859.9965675003.

The spelling of 636048384 in words is "six hundred thirty-six million, forty-eight thousand, three hundred eighty-four".