28908099167 has 4 divisors (see below), whose sum is σ = 29232909360. Its totient is φ = 28583288976.

The previous prime is 28908099163. The next prime is 28908099193. The reversal of 28908099167 is 76199080982.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28908099167 - 2² = 28908099163 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28908099163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 162404963 + ... + 162405140.

It is an arithmetic number, because the mean of its divisors is an integer number (7308227340).

Almost surely, 2^28908099167 is an apocalyptic number.

28908099167 is a deficient number, since it is larger than the sum of its proper divisors (324810193).

28908099167 is an equidigital number, since it uses as much as digits as its factorization.

28908099167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324810192.

The product of its (nonzero) digits is 3919104, while the sum is 59.

The spelling of 28908099167 in words is "twenty-eight billion, nine hundred eight million, ninety-nine thousand, one hundred sixty-seven".