128560904 has 8 divisors (see below), whose sum is σ = 241051710. Its totient is φ = 64280448.

The previous prime is 128560877. The next prime is 128560921. The reversal of 128560904 is 409065821.

It can be written as a sum of positive squares in only one way, i.e., 125664100 + 2896804 = 11210^2 + 1702^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8035049 + ... + 8035064.

Almost surely, 2^128560904 is an apocalyptic number.

It is an amenable number.

128560904 is a deficient number, since it is larger than the sum of its proper divisors (112490806).

128560904 is a wasteful number, since it uses less digits than its factorization.

128560904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16070119 (or 16070115 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 128560904 is about 11338.4700908015. The cubic root of 128560904 is about 504.7034876684.

The spelling of 128560904 in words is "one hundred twenty-eight million, five hundred sixty thousand, nine hundred four".