634336542 has 64 divisors (see below), whose sum is σ = 1641461760. Its totient is φ = 177813792.

The previous prime is 634336537. The next prime is 634336561. The reversal of 634336542 is 245633436.

It is a junction number, because it is equal to n+sod(n) for n = 634336497 and 634336506.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 4203 + ... + 35865.

It is an arithmetic number, because the mean of its divisors is an integer number (25647840).

Almost surely, 2^634336542 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 634336542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (820730880).

634336542 is an abundant number, since it is smaller than the sum of its proper divisors (1007125218).

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

634336542 is a wasteful number, since it uses less digits than its factorization.

634336542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31734 (or 31728 counting only the distinct ones).

The product of its digits is 155520, while the sum is 36.

The square root of 634336542 is about 25186.0386325440. The cubic root of 634336542 is about 859.2243511169.

Adding to 634336542 its reverse (245633436), we get a palindrome (879969978).

The spelling of 634336542 in words is "six hundred thirty-four million, three hundred thirty-six thousand, five hundred forty-two".