87928588891 has 16 divisors (see below), whose sum is σ = 104266165248. Its totient is φ = 73096624800.

The previous prime is 87928588879. The next prime is 87928588901. The reversal of 87928588891 is 19888582978.

It is a cyclic number.

It is not a de Polignac number, because 87928588891 - 2¹⁷ = 87928457819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87928588831) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2857995 + ... + 2888596.

It is an arithmetic number, because the mean of its divisors is an integer number (6516635328).

Almost surely, 2^87928588891 is an apocalyptic number.

87928588891 is a deficient number, since it is larger than the sum of its proper divisors (16337576357).

87928588891 is a wasteful number, since it uses less digits than its factorization.

87928588891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5746722.

The product of its digits is 185794560, while the sum is 73.

The spelling of 87928588891 in words is "eighty-seven billion, nine hundred twenty-eight million, five hundred eighty-eight thousand, eight hundred ninety-one".