634251648 has 64 divisors (see below), whose sum is σ = 1712412720. Its totient is φ = 207943680.

The previous prime is 634251641. The next prime is 634251719. The reversal of 634251648 is 846152436.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634251641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9886 + ... + 36962.

Almost surely, 2^634251648 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 634251648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (856206360).

634251648 is an abundant number, since it is smaller than the sum of its proper divisors (1078161072).

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

634251648 is a wasteful number, since it uses less digits than its factorization.

634251648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27155 (or 27143 counting only the distinct ones).

The product of its digits is 138240, while the sum is 39.

The square root of 634251648 is about 25184.3532376752. The cubic root of 634251648 is about 859.1860190742.

The spelling of 634251648 in words is "six hundred thirty-four million, two hundred fifty-one thousand, six hundred forty-eight".