634815384 has 96 divisors (see below), whose sum is σ = 1943380800. Its totient is φ = 171823680.

The previous prime is 634815367. The next prime is 634815413. The reversal of 634815384 is 483518436.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8139 + ... + 36549.

It is an arithmetic number, because the mean of its divisors is an integer number (20243550).

Almost surely, 2^634815384 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 634815384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (971690400).

634815384 is an abundant number, since it is smaller than the sum of its proper divisors (1308565416).

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

634815384 is a wasteful number, since it uses less digits than its factorization.

634815384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28453 (or 28442 counting only the distinct ones).

The product of its digits is 276480, while the sum is 42.

The square root of 634815384 is about 25195.5429391787. The cubic root of 634815384 is about 859.4404978028.

The spelling of 634815384 in words is "six hundred thirty-four million, eight hundred fifteen thousand, three hundred eighty-four".