636487488 has 168 divisors, whose sum is σ = 2245571328. Its totient is φ = 167851008.

The previous prime is 636487483. The next prime is 636487543. The reversal of 636487488 is 884784636.

It is a tau number, because it is divible by the number of its divisors (168).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (636487483) 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 23 ways as a sum of consecutive naturals, for example, 46345 + ... + 58487.

It is an arithmetic number, because the mean of its divisors is an integer number (13366496).

Almost surely, 2^636487488 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 636487488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1122785664).

636487488 is an abundant number, since it is smaller than the sum of its proper divisors (1609083840).

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

636487488 is a wasteful number, since it uses less digits than its factorization.

636487488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12181 (or 12168 counting only the distinct ones).

The product of its digits is 6193152, while the sum is 54.

The square root of 636487488 is about 25228.7036527841. The cubic root of 636487488 is about 860.1944251243.

The spelling of 636487488 in words is "six hundred thirty-six million, four hundred eighty-seven thousand, four hundred eighty-eight".