129029888 has 72 divisors (see below), whose sum is σ = 280379568. Its totient is φ = 58908672.

The previous prime is 129029867. The next prime is 129029921. The reversal of 129029888 is 888920921.

It is a super-3 number, since 3×129029888³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 455795 + ... + 456077.

Almost surely, 2^129029888 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 129029888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140189784).

129029888 is an abundant number, since it is smaller than the sum of its proper divisors (151349680).

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

129029888 is a wasteful number, since it uses less digits than its factorization.

129029888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449 (or 435 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 47.

The square root of 129029888 is about 11359.1323612325. The cubic root of 129029888 is about 505.3164542708.

The spelling of 129029888 in words is "one hundred twenty-nine million, twenty-nine thousand, eight hundred eighty-eight".