28189099530 has 48 divisors (see below), whose sum is σ = 73377780840. Its totient is φ = 7508260224.

The previous prime is 28189099513. The next prime is 28189099531. The reversal of 28189099530 is 3599098182.

28189099530 is a `hidden beast` number, since 2 + 8 + 18 + 9 + 0 + 99 + 530 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 19041516081 + 9147583449 = 137991^2 + 95643^2 .

It is not an unprimeable number, because it can be changed into a prime (28189099531) 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 23 ways as a sum of consecutive naturals, for example, 106825 + ... + 260364.

Almost surely, 2^28189099530 is an apocalyptic number.

28189099530 is an abundant number, since it is smaller than the sum of its proper divisors (45188681310).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28189099530 is a wasteful number, since it uses less digits than its factorization.

28189099530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368055 (or 368052 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 54.

The spelling of 28189099530 in words is "twenty-eight billion, one hundred eighty-nine million, ninety-nine thousand, five hundred thirty".