634640204 has 48 divisors (see below), whose sum is σ = 1282780800. Its totient is φ = 271699200.

The previous prime is 634640177. The next prime is 634640207. The reversal of 634640204 is 402046436.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (634640207) 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 15 ways as a sum of consecutive naturals, for example, 147524 + ... + 151764.

It is an arithmetic number, because the mean of its divisors is an integer number (26724600).

Almost surely, 2^634640204 is an apocalyptic number.

It is an amenable number.

634640204 is an abundant number, since it is smaller than the sum of its proper divisors (648140596).

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

634640204 is a wasteful number, since it uses less digits than its factorization.

634640204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4454 (or 4452 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 29.

The square root of 634640204 is about 25192.0662907988. The cubic root of 634640204 is about 859.3614351119.

The spelling of 634640204 in words is "six hundred thirty-four million, six hundred forty thousand, two hundred four".