28086011 has 4 divisors (see below), whose sum is σ = 28142352. Its totient is φ = 28029672.

The previous prime is 28085987. The next prime is 28086017. The reversal of 28086011 is 11068082.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28086011 - 2¹⁴ = 28069627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28086017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27416 + ... + 28421.

It is an arithmetic number, because the mean of its divisors is an integer number (7035588).

Almost surely, 2^28086011 is an apocalyptic number.

28086011 is a deficient number, since it is larger than the sum of its proper divisors (56341).

28086011 is an equidigital number, since it uses as much as digits as its factorization.

28086011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56340.

The product of its (nonzero) digits is 768, while the sum is 26.

The square root of 28086011 is about 5299.6236658842. The cubic root of 28086011 is about 303.9695079932.

The spelling of 28086011 in words is "twenty-eight million, eighty-six thousand, eleven".