128558996 has 12 divisors (see below), whose sum is σ = 225542100. Its totient is φ = 64118400.

The previous prime is 128558993. The next prime is 128559017. The reversal of 128558996 is 699855821.

It can be written as a sum of positive squares in 2 ways, for example, as 126112900 + 2446096 = 11230^2 + 1564^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128558993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38471 + ... + 41678.

It is an arithmetic number, because the mean of its divisors is an integer number (18795175).

Almost surely, 2^128558996 is an apocalyptic number.

It is an amenable number.

128558996 is a deficient number, since it is larger than the sum of its proper divisors (96983104).

128558996 is a wasteful number, since it uses less digits than its factorization.

128558996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80554 (or 80552 counting only the distinct ones).

The product of its digits is 1555200, while the sum is 53.

The square root of 128558996 is about 11338.3859521539. The cubic root of 128558996 is about 504.7009908518.

The spelling of 128558996 in words is "one hundred twenty-eight million, five hundred fifty-eight thousand, nine hundred ninety-six".