2112555728 has 20 divisors (see below), whose sum is σ = 4333846500. Its totient is φ = 994143744.

The previous prime is 2112555661. The next prime is 2112555743. The reversal of 2112555728 is 8275552112.

It can be written as a sum of positive squares in 2 ways, for example, as 1922997904 + 189557824 = 43852^2 + 13768^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2112555691 and 2112555700.

It is a congruent number.

It is an unprimeable number.

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, 3883103 + ... + 3883646.

It is an arithmetic number, because the mean of its divisors is an integer number (216692325).

Almost surely, 2^2112555728 is an apocalyptic number.

It is an amenable number.

2112555728 is an abundant number, since it is smaller than the sum of its proper divisors (2221290772).

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

2112555728 is a wasteful number, since it uses less digits than its factorization.

2112555728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7766774 (or 7766768 counting only the distinct ones).

The product of its digits is 56000, while the sum is 38.

The square root of 2112555728 is about 45962.5470138460. The cubic root of 2112555728 is about 1283.1262547456.

The spelling of 2112555728 in words is "two billion, one hundred twelve million, five hundred fifty-five thousand, seven hundred twenty-eight".