128780288 has 96 divisors (see below), whose sum is σ = 317378880. Its totient is φ = 50872320.

The previous prime is 128780273. The next prime is 128780291. The reversal of 128780288 is 882087821.

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, 186023 + ... + 186713.

It is an arithmetic number, because the mean of its divisors is an integer number (3306030).

Almost surely, 2^128780288 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 128780288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (158689440).

128780288 is an abundant number, since it is smaller than the sum of its proper divisors (188598592).

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

128780288 is an equidigital number, since it uses as much as digits as its factorization.

128780288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733 (or 713 counting only the distinct ones).

The product of its (nonzero) digits is 114688, while the sum is 44.

The square root of 128780288 is about 11348.1402881706. The cubic root of 128780288 is about 504.9904099084.

The spelling of 128780288 in words is "one hundred twenty-eight million, seven hundred eighty thousand, two hundred eighty-eight".