28328400875 has 8 divisors (see below), whose sum is σ = 35353844448. Its totient is φ = 22662720600.

The previous prime is 28328400829. The next prime is 28328400889. The reversal of 28328400875 is 57800482382.

It is not a de Polignac number, because 28328400875 - 2²⁸ = 28059965419 is a prime.

It is a super-2 number, since 2×28328400875² (a number of 22 digits) contains 22 as substring.

It is a Duffinian 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 7 ways as a sum of consecutive naturals, for example, 113313479 + ... + 113313728.

It is an arithmetic number, because the mean of its divisors is an integer number (4419230556).

Almost surely, 2^28328400875 is an apocalyptic number.

28328400875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28328400875 is a deficient number, since it is larger than the sum of its proper divisors (7025443573).

28328400875 is an equidigital number, since it uses as much as digits as its factorization.

28328400875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226627222 (or 226627212 counting only the distinct ones).

The product of its (nonzero) digits is 860160, while the sum is 47.

The spelling of 28328400875 in words is "twenty-eight billion, three hundred twenty-eight million, four hundred thousand, eight hundred seventy-five".