28538537575 has 12 divisors (see below), whose sum is σ = 35427710160. Its totient is φ = 22805072960.

The previous prime is 28538537561. The next prime is 28538537627. The reversal of 28538537575 is 57573583582.

It is not a de Polignac number, because 28538537575 - 2⁹ = 28538537063 is a prime.

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 11 ways as a sum of consecutive naturals, for example, 621310 + ... + 665659.

It is an arithmetic number, because the mean of its divisors is an integer number (2952309180).

Almost surely, 2^28538537575 is an apocalyptic number.

28538537575 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28538537575 is a deficient number, since it is larger than the sum of its proper divisors (6889172585).

28538537575 is a wasteful number, since it uses less digits than its factorization.

28538537575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1287866 (or 1287861 counting only the distinct ones).

The product of its digits is 35280000, while the sum is 58.

The spelling of 28538537575 in words is "twenty-eight billion, five hundred thirty-eight million, five hundred thirty-seven thousand, five hundred seventy-five".