28250820187 has 8 divisors (see below), whose sum is σ = 29743073600. Its totient is φ = 26759103624.

The previous prime is 28250820161. The next prime is 28250820223. The reversal of 28250820187 is 78102805282.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28250820187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28250880187) 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 in 7 ways as a sum of consecutive naturals, for example, 23853 + ... + 238894.

It is an arithmetic number, because the mean of its divisors is an integer number (3717884200).

Almost surely, 2^28250820187 is an apocalyptic number.

28250820187 is a deficient number, since it is larger than the sum of its proper divisors (1492253413).

28250820187 is a wasteful number, since it uses less digits than its factorization.

28250820187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268425.

The product of its (nonzero) digits is 143360, while the sum is 43.

The spelling of 28250820187 in words is "twenty-eight billion, two hundred fifty million, eight hundred twenty thousand, one hundred eighty-seven".