634618608 has 160 divisors (see below), whose sum is σ = 1859880960. Its totient is φ = 185103360.

The previous prime is 634618603. The next prime is 634618609. The reversal of 634618608 is 806816436.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 634618608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634618603) 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, 1024923 + ... + 1025541.

It is an arithmetic number, because the mean of its divisors is an integer number (11624256).

Almost surely, 2^634618608 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 634618608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (929940480).

634618608 is an abundant number, since it is smaller than the sum of its proper divisors (1225262352).

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

634618608 is a wasteful number, since it uses less digits than its factorization.

634618608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 727 (or 721 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 42.

The square root of 634618608 is about 25191.6376601443. The cubic root of 634618608 is about 859.3516873420.

The spelling of 634618608 in words is "six hundred thirty-four million, six hundred eighteen thousand, six hundred eight".