28986192811 has 4 divisors (see below), whose sum is σ = 28986535624. Its totient is φ = 28985850000.

The previous prime is 28986192803. The next prime is 28986192817. The reversal of 28986192811 is 11829168982.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 11829168982 = 2 ⋅5914584491.

It is a cyclic number.

It is not a de Polignac number, because 28986192811 - 2³ = 28986192803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28986192817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55936 + ... + 247186.

It is an arithmetic number, because the mean of its divisors is an integer number (7246633906).

Almost surely, 2^28986192811 is an apocalyptic number.

28986192811 is a deficient number, since it is larger than the sum of its proper divisors (342813).

28986192811 is a wasteful number, since it uses less digits than its factorization.

28986192811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342812.

The product of its digits is 995328, while the sum is 55.

The spelling of 28986192811 in words is "twenty-eight billion, nine hundred eighty-six million, one hundred ninety-two thousand, eight hundred eleven".