128669288 has 64 divisors (see below), whose sum is σ = 275097600. Its totient is φ = 55883520.

The previous prime is 128669263. The next prime is 128669297. The reversal of 128669288 is 882966821.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 323906 + ... + 324302.

It is an arithmetic number, because the mean of its divisors is an integer number (4298400).

Almost surely, 2^128669288 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 128669288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137548800).

128669288 is an abundant number, since it is smaller than the sum of its proper divisors (146428312).

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

128669288 is a wasteful number, since it uses less digits than its factorization.

128669288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570 (or 566 counting only the distinct ones).

The product of its digits is 663552, while the sum is 50.

The square root of 128669288 is about 11343.2485646749. The cubic root of 128669288 is about 504.8452788768.

The spelling of 128669288 in words is "one hundred twenty-eight million, six hundred sixty-nine thousand, two hundred eighty-eight".