634568688 has 240 divisors, whose sum is σ = 2076846240. Its totient is φ = 184384512.

The previous prime is 634568687. The next prime is 634568699. The reversal of 634568688 is 886865436.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634568681) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2027220 + ... + 2027532.

It is an arithmetic number, because the mean of its divisors is an integer number (8653526).

Almost surely, 2^634568688 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 634568688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1038423120).

634568688 is an abundant number, since it is smaller than the sum of its proper divisors (1442277552).

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

634568688 is a wasteful number, since it uses less digits than its factorization.

634568688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381 (or 350 counting only the distinct ones).

The product of its digits is 6635520, while the sum is 54.

The square root of 634568688 is about 25190.6468356809. The cubic root of 634568688 is about 859.3291541436.

The spelling of 634568688 in words is "six hundred thirty-four million, five hundred sixty-eight thousand, six hundred eighty-eight".