28399090975 has 12 divisors (see below), whose sum is σ = 35811736920. Its totient is φ = 22334199200.

The previous prime is 28399090927. The next prime is 28399090991. The reversal of 28399090975 is 57909099382.

It is not a de Polignac number, because 28399090975 - 2⁷ = 28399090847 is a prime.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 9625336 + ... + 9628285.

It is an arithmetic number, because the mean of its divisors is an integer number (2984311410).

Almost surely, 2^28399090975 is an apocalyptic number.

28399090975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28399090975 is a deficient number, since it is larger than the sum of its proper divisors (7412645945).

28399090975 is a wasteful number, since it uses less digits than its factorization.

28399090975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19253690 (or 19253685 counting only the distinct ones).

The product of its (nonzero) digits is 11022480, while the sum is 61.

The spelling of 28399090975 in words is "twenty-eight billion, three hundred ninety-nine million, ninety thousand, nine hundred seventy-five".