28534785708 has 96 divisors (see below), whose sum is σ = 79389031680. Its totient is φ = 7862595840.

The previous prime is 28534785707. The next prime is 28534785709. The reversal of 28534785708 is 80758743582.

It is an interprime number because it is at equal distance from previous prime (28534785707) and next prime (28534785709).

It is a super-2 number, since 2×28534785708² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28534785707) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 9123 + ... + 239066.

It is an arithmetic number, because the mean of its divisors is an integer number (826969080).

Almost surely, 2^28534785708 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28534785708, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39694515840).

28534785708 is an abundant number, since it is smaller than the sum of its proper divisors (50854245972).

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

28534785708 is a wasteful number, since it uses less digits than its factorization.

28534785708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248287 (or 248285 counting only the distinct ones).

The product of its (nonzero) digits is 15052800, while the sum is 57.

The spelling of 28534785708 in words is "twenty-eight billion, five hundred thirty-four million, seven hundred eighty-five thousand, seven hundred eight".