634838 has 4 divisors (see below), whose sum is σ = 952260. Its totient is φ = 317418.

The previous prime is 634817. The next prime is 634841. The reversal of 634838 is 838436.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158708 + ... + 158711.

It is an arithmetic number, because the mean of its divisors is an integer number (238065).

2⁶³⁴⁸³⁸ is an apocalyptic number.

634838 is a deficient number, since it is larger than the sum of its proper divisors (317422).

634838 is a wasteful number, since it uses less digits than its factorization.

634838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317421.

The product of its digits is 13824, while the sum is 32.

The square root of 634838 is about 796.7672182012. The cubic root of 634838 is about 85.9450703854.

The spelling of 634838 in words is "six hundred thirty-four thousand, eight hundred thirty-eight".