634768872 has 64 divisors (see below), whose sum is σ = 1693416000. Its totient is φ = 197697024.

The previous prime is 634768859. The next prime is 634768877. The reversal of 634768872 is 278867436.

It is not an unprimeable number, because it can be changed into a prime (634768877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23754 + ... + 42822.

It is an arithmetic number, because the mean of its divisors is an integer number (26459625).

Almost surely, 2^634768872 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 634768872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (846708000).

634768872 is an abundant number, since it is smaller than the sum of its proper divisors (1058647128).

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

634768872 is a wasteful number, since it uses less digits than its factorization.

634768872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19170 (or 19166 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 51.

The square root of 634768872 is about 25194.6199018759. The cubic root of 634768872 is about 859.4195073051.

The spelling of 634768872 in words is "six hundred thirty-four million, seven hundred sixty-eight thousand, eight hundred seventy-two".