634928 has 20 divisors (see below), whose sum is σ = 1406160. Its totient is φ = 272064.

The previous prime is 634927. The next prime is 634937. The reversal of 634928 is 829436.

It is a junction number, because it is equal to n+sod(n) for n = 634894 and 634903.

It is not an unprimeable number, because it can be changed into a prime (634927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2723 + ... + 2946.

It is an arithmetic number, because the mean of its divisors is an integer number (70308).

2⁶³⁴⁹²⁸ is an apocalyptic number.

It is an amenable number.

634928 is an abundant number, since it is smaller than the sum of its proper divisors (771232).

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

634928 is a wasteful number, since it uses less digits than its factorization.

634928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5684 (or 5678 counting only the distinct ones).

The product of its digits is 10368, while the sum is 32.

The square root of 634928 is about 796.8236944268. The cubic root of 634928 is about 85.9491316267.

The spelling of 634928 in words is "six hundred thirty-four thousand, nine hundred twenty-eight".