128071964 has 12 divisors (see below), whose sum is σ = 224208600. Its totient is φ = 64012368.

The previous prime is 128071963. The next prime is 128071969. The reversal of 128071964 is 469170821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128071961) 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 3 ways as a sum of consecutive naturals, for example, 13082 + ... + 20670.

It is an arithmetic number, because the mean of its divisors is an integer number (18684050).

Almost surely, 2^128071964 is an apocalyptic number.

It is an amenable number.

128071964 is a deficient number, since it is larger than the sum of its proper divisors (96136636).

128071964 is a wasteful number, since it uses less digits than its factorization.

128071964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11812 (or 11810 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 128071964 is about 11316.8884416168. Note that the first 3 decimals coincide. The cubic root of 128071964 is about 504.0628490953.

The spelling of 128071964 in words is "one hundred twenty-eight million, seventy-one thousand, nine hundred sixty-four".