28827811 has 4 divisors (see below), whose sum is σ = 29192800. Its totient is φ = 28462824.

The previous prime is 28827781. The next prime is 28827817. The reversal of 28827811 is 11872882.

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 28827811 - 2⁷ = 28827683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28827817) 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, 182376 + ... + 182533.

It is an arithmetic number, because the mean of its divisors is an integer number (7298200).

Almost surely, 2^28827811 is an apocalyptic number.

28827811 is a deficient number, since it is larger than the sum of its proper divisors (364989).

28827811 is an equidigital number, since it uses as much as digits as its factorization.

28827811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364988.

The product of its digits is 14336, while the sum is 37.

The square root of 28827811 is about 5369.1536577006. The cubic root of 28827811 is about 306.6224071024.

The spelling of 28827811 in words is "twenty-eight million, eight hundred twenty-seven thousand, eight hundred eleven".