28645952187 has 8 divisors (see below), whose sum is σ = 40441344336. Its totient is φ = 17973930752.

The previous prime is 28645952183. The next prime is 28645952191. The reversal of 28645952187 is 78125954682.

It is an interprime number because it is at equal distance from previous prime (28645952183) and next prime (28645952191).

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 28645952187 - 2² = 28645952183 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28645952183) 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, 280842618 + ... + 280842719.

It is an arithmetic number, because the mean of its divisors is an integer number (5055168042).

Almost surely, 2^28645952187 is an apocalyptic number.

28645952187 is a deficient number, since it is larger than the sum of its proper divisors (11795392149).

28645952187 is a wasteful number, since it uses less digits than its factorization.

28645952187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561685357.

The product of its digits is 9676800, while the sum is 57.

The spelling of 28645952187 in words is "twenty-eight billion, six hundred forty-five million, nine hundred fifty-two thousand, one hundred eighty-seven".