634861236 has 12 divisors (see below), whose sum is σ = 1481342912. Its totient is φ = 211620408.

The previous prime is 634861219. The next prime is 634861237. The reversal of 634861236 is 632168436.

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

It is a junction number, because it is equal to n+sod(n) for n = 634861194 and 634861203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634861237) 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 3 ways as a sum of consecutive naturals, for example, 26452540 + ... + 26452563.

Almost surely, 2^634861236 is an apocalyptic number.

It is an amenable number.

634861236 is an abundant number, since it is smaller than the sum of its proper divisors (846481676).

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

634861236 is a wasteful number, since it uses less digits than its factorization.

634861236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52905110 (or 52905108 counting only the distinct ones).

The product of its digits is 124416, while the sum is 39.

The square root of 634861236 is about 25196.4528455892. The cubic root of 634861236 is about 859.4611894443.

The spelling of 634861236 in words is "six hundred thirty-four million, eight hundred sixty-one thousand, two hundred thirty-six".