634434520 has 16 divisors (see below), whose sum is σ = 1427477760. Its totient is φ = 253773792.

The previous prime is 634434517. The next prime is 634434571. The reversal of 634434520 is 25434436.

634434520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7930392 + ... + 7930471.

It is an arithmetic number, because the mean of its divisors is an integer number (89217360).

Almost surely, 2^634434520 is an apocalyptic number.

It is an amenable number.

634434520 is an abundant number, since it is smaller than the sum of its proper divisors (793043240).

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

634434520 is a wasteful number, since it uses less digits than its factorization.

634434520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15860874 (or 15860870 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 31.

The square root of 634434520 is about 25187.9836429993. The cubic root of 634434520 is about 859.2685867048.

Adding to 634434520 its reverse (25434436), we get a palindrome (659868956).

The spelling of 634434520 in words is "six hundred thirty-four million, four hundred thirty-four thousand, five hundred twenty".