52091728 has 20 divisors (see below), whose sum is σ = 108691828. Its totient is φ = 24042240.

The previous prime is 52091719. The next prime is 52091783. The reversal of 52091728 is 82719025.

52091728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 34012224 + 18079504 = 5832^2 + 4252^2 .

It is a junction number, because it is equal to n+sod(n) for n = 52091693 and 52091702.

It is a congruent number.

It is an unprimeable number.

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, 125013 + ... + 125428.

Almost surely, 2^52091728 is an apocalyptic number.

It is an amenable number.

52091728 is an abundant number, since it is smaller than the sum of its proper divisors (56600100).

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

52091728 is a wasteful number, since it uses less digits than its factorization.

52091728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250462 (or 250456 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 52091728 is about 7217.4599410042. The cubic root of 52091728 is about 373.4704584147.

The spelling of 52091728 in words is "fifty-two million, ninety-one thousand, seven hundred twenty-eight".