128039560 has 32 divisors (see below), whose sum is σ = 314280000. Its totient is φ = 46559680.

The previous prime is 128039557. The next prime is 128039567. The reversal of 128039560 is 65930821.

It is not an unprimeable number, because it can be changed into a prime (128039567) 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 7 ways as a sum of consecutive naturals, for example, 145060 + ... + 145939.

It is an arithmetic number, because the mean of its divisors is an integer number (9821250).

Almost surely, 2^128039560 is an apocalyptic number.

128039560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128039560 is an abundant number, since it is smaller than the sum of its proper divisors (186240440).

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

128039560 is a wasteful number, since it uses less digits than its factorization.

128039560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291021 (or 291017 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 128039560 is about 11315.4566854370. The cubic root of 128039560 is about 504.0203338567.

The spelling of 128039560 in words is "one hundred twenty-eight million, thirty-nine thousand, five hundred sixty".