129630000 has 200 divisors, whose sum is σ = 435798000. Its totient is φ = 33152000.

The previous prime is 129629999. The next prime is 129630023. The reversal of 129630000 is 36921.

It is a tau number, because it is divible by the number of its divisors (200).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 869926 + ... + 870074.

It is an arithmetic number, because the mean of its divisors is an integer number (2178990).

Almost surely, 2^129630000 is an apocalyptic number.

129630000 is a gapful number since it is divisible by the number (10) 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 129630000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (217899000).

129630000 is an abundant number, since it is smaller than the sum of its proper divisors (306168000).

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

129630000 is a wasteful number, since it uses less digits than its factorization.

129630000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209 (or 188 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 129630000 is about 11385.5171160558. The cubic root of 129630000 is about 506.0986439771.

Adding to 129630000 its reverse (36921), we get a palindrome (129666921).

The spelling of 129630000 in words is "one hundred twenty-nine million, six hundred thirty thousand".