28189404243 has 96 divisors (see below), whose sum is σ = 56497548800. Its totient is φ = 13517254080.

The previous prime is 28189404223. The next prime is 28189404281. The reversal of 28189404243 is 34240498182.

28189404243 is a `hidden beast` number, since 2 + 8 + 189 + 40 + 424 + 3 = 666.

It is not a de Polignac number, because 28189404243 - 2⁵ = 28189404211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28189404223) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 249888 + ... + 344706.

Almost surely, 2^28189404243 is an apocalyptic number.

28189404243 is an abundant number, since it is smaller than the sum of its proper divisors (28308144557).

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

28189404243 is a wasteful number, since it uses less digits than its factorization.

28189404243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94870 (or 94853 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 45.

The spelling of 28189404243 in words is "twenty-eight billion, one hundred eighty-nine million, four hundred four thousand, two hundred forty-three".