129127650 has 48 divisors (see below), whose sum is σ = 322413888. Its totient is φ = 34200000.

The previous prime is 129127627. The next prime is 129127657. The reversal of 129127650 is 56721921.

It is not an unprimeable number, because it can be changed into a prime (129127657) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19800 + ... + 25500.

It is an arithmetic number, because the mean of its divisors is an integer number (6716956).

Almost surely, 2^129127650 is an apocalyptic number.

129127650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 129127650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (161206944).

129127650 is an abundant number, since it is smaller than the sum of its proper divisors (193286238).

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

129127650 is a wasteful number, since it uses less digits than its factorization.

129127650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5867 (or 5862 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 33.

The square root of 129127650 is about 11363.4347800302. The cubic root of 129127650 is about 505.4440429939. Note that the first 3 decimals are identical.

The spelling of 129127650 in words is "one hundred twenty-nine million, one hundred twenty-seven thousand, six hundred fifty".