634896128 has 18 divisors (see below), whose sum is σ = 1267312704. Its totient is φ = 317447936.

The previous prime is 634896121. The next prime is 634896139. The reversal of 634896128 is 821698436.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634896121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1239776 + ... + 1240287.

Almost surely, 2^634896128 is an apocalyptic number.

It is an amenable number.

634896128 is a deficient number, since it is larger than the sum of its proper divisors (632416576).

634896128 is an equidigital number, since it uses as much as digits as its factorization.

634896128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2480079 (or 2480065 counting only the distinct ones).

The product of its digits is 497664, while the sum is 47.

The square root of 634896128 is about 25197.1452351253. The cubic root of 634896128 is about 859.4769344968.

The spelling of 634896128 in words is "six hundred thirty-four million, eight hundred ninety-six thousand, one hundred twenty-eight".