28805163 has 4 divisors (see below), whose sum is σ = 38406888. Its totient is φ = 19203440.

The previous prime is 28805113. The next prime is 28805171. The reversal of 28805163 is 36150882.

It is a happy number.

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 28805163 - 2⁹ = 28804651 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28805113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4800858 + ... + 4800863.

It is an arithmetic number, because the mean of its divisors is an integer number (9601722).

Almost surely, 2^28805163 is an apocalyptic number.

28805163 is a deficient number, since it is larger than the sum of its proper divisors (9601725).

28805163 is an equidigital number, since it uses as much as digits as its factorization.

28805163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9601724.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 28805163 is about 5367.0441585662. The cubic root of 28805163 is about 306.5420887870.

The spelling of 28805163 in words is "twenty-eight million, eight hundred five thousand, one hundred sixty-three".