129012888 has 64 divisors (see below), whose sum is σ = 354297600. Its totient is φ = 38966400.

The previous prime is 129012883. The next prime is 129012889. The reversal of 129012888 is 888210921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129012883) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4338 + ... + 16638.

It is an arithmetic number, because the mean of its divisors is an integer number (5535900).

Almost surely, 2^129012888 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 129012888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (177148800).

129012888 is an abundant number, since it is smaller than the sum of its proper divisors (225284712).

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

129012888 is a wasteful number, since it uses less digits than its factorization.

129012888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12352 (or 12348 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 39.

The square root of 129012888 is about 11358.3840399944. The cubic root of 129012888 is about 505.2942610742.

The spelling of 129012888 in words is "one hundred twenty-nine million, twelve thousand, eight hundred eighty-eight".