128500704 has 144 divisors (see below), whose sum is σ = 388402560. Its totient is φ = 40227840.

The previous prime is 128500703. The next prime is 128500721. The reversal of 128500704 is 407005821.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128500703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 330142 + ... + 330530.

It is an arithmetic number, because the mean of its divisors is an integer number (2697240).

Almost surely, 2^128500704 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 128500704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (194201280).

128500704 is an abundant number, since it is smaller than the sum of its proper divisors (259901856).

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

128500704 is a wasteful number, since it uses less digits than its factorization.

128500704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473 (or 462 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 128500704 is about 11335.8151008209. The cubic root of 128500704 is about 504.6246977910.

The spelling of 128500704 in words is "one hundred twenty-eight million, five hundred thousand, seven hundred four".