28975787985 has 32 divisors (see below), whose sum is σ = 47660113152. Its totient is φ = 15021607680.

The previous prime is 28975787927. The next prime is 28975788011. The reversal of 28975787985 is 58978757982.

It is not a de Polignac number, because 28975787985 - 2¹⁶ = 28975722449 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 564252 + ... + 613458.

It is an arithmetic number, because the mean of its divisors is an integer number (1489378536).

Almost surely, 2^28975787985 is an apocalyptic number.

It is an amenable number.

28975787985 is a deficient number, since it is larger than the sum of its proper divisors (18684325167).

28975787985 is a wasteful number, since it uses less digits than its factorization.

28975787985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50313.

The product of its digits is 711244800, while the sum is 75.

The spelling of 28975787985 in words is "twenty-eight billion, nine hundred seventy-five million, seven hundred eighty-seven thousand, nine hundred eighty-five".