634636 has 12 divisors (see below), whose sum is σ = 1149120. Its totient is φ = 306320.

The previous prime is 634609. The next prime is 634643. The reversal of 634636 is 636436.

634636 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2620 + ... + 2851.

It is an arithmetic number, because the mean of its divisors is an integer number (95760).

2⁶³⁴⁶³⁶ is an apocalyptic number.

It is an amenable number.

634636 is a deficient number, since it is larger than the sum of its proper divisors (514484).

634636 is a wasteful number, since it uses less digits than its factorization.

634636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5504 (or 5502 counting only the distinct ones).

The product of its digits is 7776, while the sum is 28.

The square root of 634636 is about 796.6404458725. The cubic root of 634636 is about 85.9359537573.

The spelling of 634636 in words is "six hundred thirty-four thousand, six hundred thirty-six".