128029716 has 72 divisors (see below), whose sum is σ = 334623744. Its totient is φ = 41247360.

The previous prime is 128029687. The next prime is 128029747. The reversal of 128029716 is 617920821.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 187111 + ... + 187793.

It is an arithmetic number, because the mean of its divisors is an integer number (4647552).

Almost surely, 2^128029716 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 128029716, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (167311872).

128029716 is an abundant number, since it is smaller than the sum of its proper divisors (206594028).

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

128029716 is a wasteful number, since it uses less digits than its factorization.

128029716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 861 (or 856 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 128029716 is about 11315.0216968418. The cubic root of 128029716 is about 504.0074167465.

The spelling of 128029716 in words is "one hundred twenty-eight million, twenty-nine thousand, seven hundred sixteen".