128968592 has 20 divisors (see below), whose sum is σ = 251473116. Its totient is φ = 64072320.

The previous prime is 128968591. The next prime is 128968601. The reversal of 128968592 is 295869821.

It can be written as a sum of positive squares in 2 ways, for example, as 72658576 + 56310016 = 8524^2 + 7504^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 128968592.

It is not an unprimeable number, because it can be changed into a prime (128968591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23159 + ... + 28182.

Almost surely, 2^128968592 is an apocalyptic number.

It is an amenable number.

128968592 is a deficient number, since it is larger than the sum of its proper divisors (122504524).

128968592 is a wasteful number, since it uses less digits than its factorization.

128968592 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51506 (or 51500 counting only the distinct ones).

The product of its digits is 622080, while the sum is 50.

The square root of 128968592 is about 11356.4339473270. The cubic root of 128968592 is about 505.2364242769.

The spelling of 128968592 in words is "one hundred twenty-eight million, nine hundred sixty-eight thousand, five hundred ninety-two".