634605938 has 18 divisors (see below), whose sum is σ = 975166191. Its totient is φ = 309732444.

The previous prime is 634605901. The next prime is 634605943. The reversal of 634605938 is 839506436.

634605938 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 317302969 + 317302969 = 17813^2 + 17813^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=17813.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1674233 + ... + 1674611.

Almost surely, 2^634605938 is an apocalyptic number.

634605938 is a deficient number, since it is larger than the sum of its proper divisors (340560253).

634605938 is an frugal number, since it uses more digits than its factorization.

634605938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 854 (or 428 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 44.

The square root of 634605938 is about 25191.3861865519. The cubic root of 634605938 is about 859.3459683909.

The spelling of 634605938 in words is "six hundred thirty-four million, six hundred five thousand, nine hundred thirty-eight".