634520000 has 140 divisors (see below), whose sum is σ = 1630634280. Its totient is φ = 244608000.

The previous prime is 634519999. The next prime is 634520039. The reversal of 634520000 is 25436.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1159727 + ... + 1160273.

Almost surely, 2^634520000 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 634520000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (815317140).

634520000 is an abundant number, since it is smaller than the sum of its proper divisors (996114280).

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

634520000 is an equidigital number, since it uses as much as digits as its factorization.

634520000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608 (or 583 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 634520000 is about 25189.6804267144. The cubic root of 634520000 is about 859.3071759145.

Adding to 634520000 its reverse (25436), we get a palindrome (634545436).

The spelling of 634520000 in words is "six hundred thirty-four million, five hundred twenty thousand".