28189008197 has 8 divisors (see below), whose sum is σ = 32233466496. Its totient is φ = 24148914192.

The previous prime is 28189008193. The next prime is 28189008203. The reversal of 28189008197 is 79180098182.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28189008197 - 2² = 28189008193 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28189008193) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1077218 + ... + 1103075.

It is an arithmetic number, because the mean of its divisors is an integer number (4029183312).

Almost surely, 2^28189008197 is an apocalyptic number.

It is an amenable number.

28189008197 is a deficient number, since it is larger than the sum of its proper divisors (4044458299).

28189008197 is a wasteful number, since it uses less digits than its factorization.

28189008197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2182147.

The product of its (nonzero) digits is 580608, while the sum is 53.

The spelling of 28189008197 in words is "twenty-eight billion, one hundred eighty-nine million, eight thousand, one hundred ninety-seven".