634631738 has 16 divisors (see below), whose sum is σ = 1025589600. Its totient is φ = 292788336.

The previous prime is 634631731. The next prime is 634631747. The reversal of 634631738 is 837136436.

It is a junction number, because it is equal to n+sod(n) for n = 634631695 and 634631704.

It is not an unprimeable number, because it can be changed into a prime (634631731) 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 7 ways as a sum of consecutive naturals, for example, 121913 + ... + 127011.

It is an arithmetic number, because the mean of its divisors is an integer number (64099350).

Almost surely, 2^634631738 is an apocalyptic number.

634631738 is a deficient number, since it is larger than the sum of its proper divisors (390957862).

634631738 is a wasteful number, since it uses less digits than its factorization.

634631738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9901.

The product of its digits is 217728, while the sum is 41.

The square root of 634631738 is about 25191.8982611474. The cubic root of 634631738 is about 859.3576138464.

The spelling of 634631738 in words is "six hundred thirty-four million, six hundred thirty-one thousand, seven hundred thirty-eight".