634443660 has 72 divisors (see below), whose sum is σ = 1942523856. Its totient is φ = 167598720.

The previous prime is 634443659. The next prime is 634443679. The reversal of 634443660 is 66344436.

634443660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 2790 + ... + 35730.

It is an arithmetic number, because the mean of its divisors is an integer number (26979498).

Almost surely, 2^634443660 is an apocalyptic number.

634443660 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 634443660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (971261928).

634443660 is an abundant number, since it is smaller than the sum of its proper divisors (1308080196).

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

634443660 is a wasteful number, since it uses less digits than its factorization.

634443660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33063 (or 33058 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 36.

The square root of 634443660 is about 25188.1650780679. The cubic root of 634443660 is about 859.2727130445.

The spelling of 634443660 in words is "six hundred thirty-four million, four hundred forty-three thousand, six hundred sixty".