28320775475 has 6 divisors (see below), whose sum is σ = 35117761620. Its totient is φ = 22656620360.

The previous prime is 28320775453. The next prime is 28320775519. The reversal of 28320775475 is 57457702382.

It is not a de Polignac number, because 28320775475 - 2²² = 28316581171 is a prime.

It is a super-2 number, since 2×28320775475² (a number of 22 digits) contains 22 as substring.

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 5 ways as a sum of consecutive naturals, for example, 566415485 + ... + 566415534.

It is an arithmetic number, because the mean of its divisors is an integer number (5852960270).

Almost surely, 2^28320775475 is an apocalyptic number.

28320775475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28320775475 is a deficient number, since it is larger than the sum of its proper divisors (6796986145).

28320775475 is a wasteful number, since it uses less digits than its factorization.

28320775475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1132831029 (or 1132831024 counting only the distinct ones).

The product of its (nonzero) digits is 3292800, while the sum is 50.

The spelling of 28320775475 in words is "twenty-eight billion, three hundred twenty million, seven hundred seventy-five thousand, four hundred seventy-five".