28751217875 has 8 divisors (see below), whose sum is σ = 35881520064. Its totient is φ = 23000974200.

The previous prime is 28751217841. The next prime is 28751217881. The reversal of 28751217875 is 57871215782.

It is not a de Polignac number, because 28751217875 - 2⁸ = 28751217619 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115004747 + ... + 115004996.

It is an arithmetic number, because the mean of its divisors is an integer number (4485190008).

Almost surely, 2^28751217875 is an apocalyptic number.

28751217875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28751217875 is a deficient number, since it is larger than the sum of its proper divisors (7130302189).

28751217875 is an equidigital number, since it uses as much as digits as its factorization.

28751217875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230009758 (or 230009748 counting only the distinct ones).

The product of its digits is 2195200, while the sum is 53.

The spelling of 28751217875 in words is "twenty-eight billion, seven hundred fifty-one million, two hundred seventeen thousand, eight hundred seventy-five".