28189099529 has 4 divisors (see below), whose sum is σ = 29414712576. Its totient is φ = 26963486484.

The previous prime is 28189099513. The next prime is 28189099531. The reversal of 28189099529 is 92599098182.

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, and also an emirpimes, since its reverse is a distinct semiprime: 92599098182 = 2 ⋅46299549091.

It is a cyclic number.

It is not a de Polignac number, because 28189099529 - 2⁴ = 28189099513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28189099229) 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, 612806489 + ... + 612806534.

It is an arithmetic number, because the mean of its divisors is an integer number (7353678144).

Almost surely, 2^28189099529 is an apocalyptic number.

It is an amenable number.

28189099529 is a deficient number, since it is larger than the sum of its proper divisors (1225613047).

28189099529 is a wasteful number, since it uses less digits than its factorization.

28189099529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1225613046.

The product of its (nonzero) digits is 8398080, while the sum is 62.

The spelling of 28189099529 in words is "twenty-eight billion, one hundred eighty-nine million, ninety-nine thousand, five hundred twenty-nine".