28276823 has 4 divisors (see below), whose sum is σ = 28287960. Its totient is φ = 28265688.

The previous prime is 28276819. The next prime is 28276837. The reversal of 28276823 is 32867282.

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.

It is a cyclic number.

It is not a de Polignac number, because 28276823 - 2² = 28276819 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28276873) 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, 308 + ... + 7526.

It is an arithmetic number, because the mean of its divisors is an integer number (7071990).

Almost surely, 2^28276823 is an apocalyptic number.

28276823 is a deficient number, since it is larger than the sum of its proper divisors (11137).

28276823 is an equidigital number, since it uses as much as digits as its factorization.

28276823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11136.

The product of its digits is 64512, while the sum is 38.

The square root of 28276823 is about 5317.5956032779. The cubic root of 28276823 is about 304.6563288366.

The spelling of 28276823 in words is "twenty-eight million, two hundred seventy-six thousand, eight hundred twenty-three".