128428675 has 24 divisors (see below), whose sum is σ = 168292800. Its totient is φ = 97063680.

The previous prime is 128428667. The next prime is 128428717. The reversal of 128428675 is 576824821.

It is a happy number.

It is not a de Polignac number, because 128428675 - 2³ = 128428667 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32191 + ... + 35959.

It is an arithmetic number, because the mean of its divisors is an integer number (7012200).

Almost surely, 2^128428675 is an apocalyptic number.

128428675 is a deficient number, since it is larger than the sum of its proper divisors (39864125).

128428675 is a wasteful number, since it uses less digits than its factorization.

128428675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3855 (or 3850 counting only the distinct ones).

The product of its digits is 215040, while the sum is 43.

The square root of 128428675 is about 11332.6376011942. The cubic root of 128428675 is about 504.5303937530.

The spelling of 128428675 in words is "one hundred twenty-eight million, four hundred twenty-eight thousand, six hundred seventy-five".