634630660 has 96 divisors (see below), whose sum is σ = 1423070208. Its totient is φ = 237404160.

The previous prime is 634630637. The next prime is 634630663. The reversal of 634630660 is 66036436.

It is a super-2 number, since 2×634630660² = 805512149224071200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (634630663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2469252 + ... + 2469508.

It is an arithmetic number, because the mean of its divisors is an integer number (14823648).

Almost surely, 2^634630660 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 634630660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (711535104).

634630660 is an abundant number, since it is smaller than the sum of its proper divisors (788439548).

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

634630660 is a wasteful number, since it uses less digits than its factorization.

634630660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421 (or 419 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 34.

The square root of 634630660 is about 25191.8768653707. The cubic root of 634630660 is about 859.3571272713.

The spelling of 634630660 in words is "six hundred thirty-four million, six hundred thirty thousand, six hundred sixty".