28056005187 has 16 divisors (see below), whose sum is σ = 43144231680. Its totient is φ = 15884919072.

The previous prime is 28056005179. The next prime is 28056005203. The reversal of 28056005187 is 78150065082.

It is not a de Polignac number, because 28056005187 - 2³ = 28056005179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28056005147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6126153 + ... + 6130730.

It is an arithmetic number, because the mean of its divisors is an integer number (2696514480).

Almost surely, 2^28056005187 is an apocalyptic number.

28056005187 is a deficient number, since it is larger than the sum of its proper divisors (15088226493).

28056005187 is a wasteful number, since it uses less digits than its factorization.

28056005187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12257002.

The product of its (nonzero) digits is 134400, while the sum is 42.

The spelling of 28056005187 in words is "twenty-eight billion, fifty-six million, five thousand, one hundred eighty-seven".