634115420 has 48 divisors (see below), whose sum is σ = 1346194080. Its totient is φ = 250892544.

The previous prime is 634115401. The next prime is 634115429. The reversal of 634115420 is 24511436.

It is a self number, because there is not a number n which added to its sum of digits gives 634115420.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634115429) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 894026 + ... + 894734.

It is an arithmetic number, because the mean of its divisors is an integer number (28045710).

Almost surely, 2^634115420 is an apocalyptic number.

It is an amenable number.

634115420 is an abundant number, since it is smaller than the sum of its proper divisors (712078660).

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

634115420 is a wasteful number, since it uses less digits than its factorization.

634115420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1142 (or 1140 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 634115420 is about 25181.6484766188. The cubic root of 634115420 is about 859.1245011292.

Adding to 634115420 its reverse (24511436), we get a palindrome (658626856).

The spelling of 634115420 in words is "six hundred thirty-four million, one hundred fifteen thousand, four hundred twenty".