28250880187 has 2 divisors, whose sum is σ = 28250880188. Its totient is φ = 28250880186.

The previous prime is 28250880131. The next prime is 28250880223. The reversal of 28250880187 is 78108805282.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28250880187 is a prime.

It is a super-2 number, since 2×28250880187² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28250880187.

It is not a weakly prime, because it can be changed into another prime (28250880107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14125440093 + 14125440094.

It is an arithmetic number, because the mean of its divisors is an integer number (14125440094).

Almost surely, 2^28250880187 is an apocalyptic number.

28250880187 is a deficient number, since it is larger than the sum of its proper divisors (1).

28250880187 is an equidigital number, since it uses as much as digits as its factorization.

28250880187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 573440, while the sum is 49.

The spelling of 28250880187 in words is "twenty-eight billion, two hundred fifty million, eight hundred eighty thousand, one hundred eighty-seven".