634836 has 12 divisors (see below), whose sum is σ = 1481312. Its totient is φ = 211608.

The previous prime is 634817. The next prime is 634841. The reversal of 634836 is 638436.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

634836 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26440 + ... + 26463.

2⁶³⁴⁸³⁶ is an apocalyptic number.

It is an amenable number.

634836 is an abundant number, since it is smaller than the sum of its proper divisors (846476).

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

634836 is a wasteful number, since it uses less digits than its factorization.

634836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52910 (or 52908 counting only the distinct ones).

The product of its digits is 10368, while the sum is 30.

The square root of 634836 is about 796.7659631284. The cubic root of 634836 is about 85.9449801313.

Subtracting 634836 from its reverse (638436), we obtain a square (3600 = 60²).

The spelling of 634836 in words is "six hundred thirty-four thousand, eight hundred thirty-six".