28328038327525 has 6 divisors (see below), whose sum is σ = 35126767526162. Its totient is φ = 22662430662000.

The previous prime is 28328038327499. The next prime is 28328038327553. The reversal of 28328038327525 is 52572383082382.

It can be written as a sum of positive squares in 3 ways, for example, as 682662622756 + 27645375704769 = 826234^2 + 5257887^2 .

It is not a de Polignac number, because 28328038327525 - 2⁹ = 28328038327013 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28328038327525.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 566560766526 + ... + 566560766575.

Almost surely, 2^{28328038327525} is an apocalyptic number.

28328038327525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28328038327525 is a deficient number, since it is larger than the sum of its proper divisors (6798729198637).

28328038327525 is a wasteful number, since it uses less digits than its factorization.

28328038327525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1133121533111 (or 1133121533106 counting only the distinct ones).

The product of its (nonzero) digits is 38707200, while the sum is 58.

The spelling of 28328038327525 in words is "twenty-eight trillion, three hundred twenty-eight billion, thirty-eight million, three hundred twenty-seven thousand, five hundred twenty-five".