634710648 has 128 divisors (see below), whose sum is σ = 1888588800. Its totient is φ = 175219200.

The previous prime is 634710641. The next prime is 634710667. The reversal of 634710648 is 846017436.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634710641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 269958 + ... + 272298.

It is an arithmetic number, because the mean of its divisors is an integer number (14754600).

Almost surely, 2^634710648 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 634710648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (944294400).

634710648 is an abundant number, since it is smaller than the sum of its proper divisors (1253878152).

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

634710648 is a wasteful number, since it uses less digits than its factorization.

634710648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2453 (or 2449 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 39.

The square root of 634710648 is about 25193.4643905915. The cubic root of 634710648 is about 859.3932298290.

The spelling of 634710648 in words is "six hundred thirty-four million, seven hundred ten thousand, six hundred forty-eight".