129053728 has 48 divisors (see below), whose sum is σ = 264539520. Its totient is φ = 61924096.

The previous prime is 129053693. The next prime is 129053731. The reversal of 129053728 is 827350921.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78903 + ... + 80521.

It is an arithmetic number, because the mean of its divisors is an integer number (5511240).

Almost surely, 2^129053728 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 129053728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132269760).

129053728 is an abundant number, since it is smaller than the sum of its proper divisors (135485792).

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

129053728 is a wasteful number, since it uses less digits than its factorization.

129053728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1729 (or 1721 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 129053728 is about 11360.1816886879. The cubic root of 129053728 is about 505.3475736819.

The spelling of 129053728 in words is "one hundred twenty-nine million, fifty-three thousand, seven hundred twenty-eight".