2185128968 has 32 divisors (see below), whose sum is σ = 4471524000. Its totient is φ = 992808960.

The previous prime is 2185128931. The next prime is 2185128971. The reversal of 2185128968 is 8698215812.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

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, 289223 + ... + 296681.

It is an arithmetic number, because the mean of its divisors is an integer number (139735125).

Almost surely, 2^2185128968 is an apocalyptic number.

It is an amenable number.

2185128968 is an abundant number, since it is smaller than the sum of its proper divisors (2286395032).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2185128968 is a wasteful number, since it uses less digits than its factorization.

2185128968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10805 (or 10801 counting only the distinct ones).

The product of its digits is 552960, while the sum is 50.

The square root of 2185128968 is about 46745.3630641586. The cubic root of 2185128968 is about 1297.6543437284.

The spelling of 2185128968 in words is "two billion, one hundred eighty-five million, one hundred twenty-eight thousand, nine hundred sixty-eight".