634409868 has 24 divisors (see below), whose sum is σ = 1502385472. Its totient is φ = 208313424.

The previous prime is 634409863. The next prime is 634409899. The reversal of 634409868 is 868904436.

It is not an unprimeable number, because it can be changed into a prime (634409861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 393730 + ... + 395337.

Almost surely, 2^634409868 is an apocalyptic number.

It is an amenable number.

634409868 is an abundant number, since it is smaller than the sum of its proper divisors (867975604).

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

634409868 is a wasteful number, since it uses less digits than its factorization.

634409868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 789141 (or 789139 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 48.

The square root of 634409868 is about 25187.4942779150. The cubic root of 634409868 is about 859.2574571277.

The spelling of 634409868 in words is "six hundred thirty-four million, four hundred nine thousand, eight hundred sixty-eight".