28256853 has 4 divisors (see below), whose sum is σ = 37675808. Its totient is φ = 18837900.

The previous prime is 28256849. The next prime is 28256861. The reversal of 28256853 is 35865282.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 28256853 - 2² = 28256849 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28256843) 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, 4709473 + ... + 4709478.

It is an arithmetic number, because the mean of its divisors is an integer number (9418952).

Almost surely, 2^28256853 is an apocalyptic number.

It is an amenable number.

28256853 is a deficient number, since it is larger than the sum of its proper divisors (9418955).

28256853 is an equidigital number, since it uses as much as digits as its factorization.

28256853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9418954.

The product of its digits is 115200, while the sum is 39.

The square root of 28256853 is about 5315.7175432861. The cubic root of 28256853 is about 304.5845925871.

The spelling of 28256853 in words is "twenty-eight million, two hundred fifty-six thousand, eight hundred fifty-three".