128185672 has 32 divisors (see below), whose sum is σ = 245790720. Its totient is φ = 62657280.

The previous prime is 128185667. The next prime is 128185697. The reversal of 128185672 is 276581821.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71248 + ... + 73024.

It is an arithmetic number, because the mean of its divisors is an integer number (7680960).

Almost surely, 2^128185672 is an apocalyptic number.

It is an amenable number.

128185672 is a deficient number, since it is larger than the sum of its proper divisors (117605048).

128185672 is a wasteful number, since it uses less digits than its factorization.

128185672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1981 (or 1977 counting only the distinct ones).

The product of its digits is 53760, while the sum is 40.

The square root of 128185672 is about 11321.9111460919. The cubic root of 128185672 is about 504.2119814592.

The spelling of 128185672 in words is "one hundred twenty-eight million, one hundred eighty-five thousand, six hundred seventy-two".