128440588 has 12 divisors (see below), whose sum is σ = 226954000. Its totient is φ = 63596592.

The previous prime is 128440549. The next prime is 128440607. The reversal of 128440588 is 885044821.

It is a self number, because there is not a number n which added to its sum of digits gives 128440588.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155463 + ... + 156286.

Almost surely, 2^128440588 is an apocalyptic number.

It is an amenable number.

128440588 is a deficient number, since it is larger than the sum of its proper divisors (98513412).

128440588 is a wasteful number, since it uses less digits than its factorization.

128440588 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311856 (or 311854 counting only the distinct ones).

The product of its (nonzero) digits is 81920, while the sum is 40.

The square root of 128440588 is about 11333.1631948014. The cubic root of 128440588 is about 504.5459932930.

The spelling of 128440588 in words is "one hundred twenty-eight million, four hundred forty thousand, five hundred eighty-eight".