28113089 has 4 divisors (see below), whose sum is σ = 28509120. Its totient is φ = 27717060.

The previous prime is 28113079. The next prime is 28113091. The reversal of 28113089 is 98031182.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28113089 - 2²⁴ = 11335873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28113079) 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, 197909 + ... + 198050.

It is an arithmetic number, because the mean of its divisors is an integer number (7127280).

Almost surely, 2^28113089 is an apocalyptic number.

It is an amenable number.

28113089 is a deficient number, since it is larger than the sum of its proper divisors (396031).

28113089 is an equidigital number, since it uses as much as digits as its factorization.

28113089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396030.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 28113089 is about 5302.1777601284. The cubic root of 28113089 is about 304.0671632825.

The spelling of 28113089 in words is "twenty-eight million, one hundred thirteen thousand, eighty-nine".