634834384 has 60 divisors (see below), whose sum is σ = 1309603680. Its totient is φ = 298059840.

The previous prime is 634834379. The next prime is 634834391. The reversal of 634834384 is 483438436.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 634834384.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 756237 + ... + 757075.

It is an arithmetic number, because the mean of its divisors is an integer number (21826728).

Almost surely, 2^634834384 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 634834384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (654801840).

634834384 is an abundant number, since it is smaller than the sum of its proper divisors (674769296).

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

634834384 is a wasteful number, since it uses less digits than its factorization.

634834384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1016 (or 991 counting only the distinct ones).

The product of its digits is 663552, while the sum is 43.

The square root of 634834384 is about 25195.9199871725. The cubic root of 634834384 is about 859.4490720576.

The spelling of 634834384 in words is "six hundred thirty-four million, eight hundred thirty-four thousand, three hundred eighty-four".