28331504875 has 16 divisors (see below), whose sum is σ = 35405678880. Its totient is φ = 22634460000.

The previous prime is 28331504863. The next prime is 28331504881. The reversal of 28331504875 is 57840513382.

It is not a de Polignac number, because 28331504875 - 2²¹ = 28329407723 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60976 + ... + 245725.

It is an arithmetic number, because the mean of its divisors is an integer number (2212854930).

Almost surely, 2^28331504875 is an apocalyptic number.

28331504875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28331504875 is a deficient number, since it is larger than the sum of its proper divisors (7074174005).

28331504875 is an equidigital number, since it uses as much as digits as its factorization.

28331504875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307455 (or 307445 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 46.

The spelling of 28331504875 in words is "twenty-eight billion, three hundred thirty-one million, five hundred four thousand, eight hundred seventy-five".