28047853 has 4 divisors (see below), whose sum is σ = 28066720. Its totient is φ = 28028988.

The previous prime is 28047829. The next prime is 28047863. The reversal of 28047853 is 35874082.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28047853 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 (28047863) 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, 6993 + ... + 10246.

It is an arithmetic number, because the mean of its divisors is an integer number (7016680).

Almost surely, 2^28047853 is an apocalyptic number.

It is an amenable number.

28047853 is a deficient number, since it is larger than the sum of its proper divisors (18867).

28047853 is a wasteful number, since it uses less digits than its factorization.

28047853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18866.

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 28047853 is about 5296.0223753304. The cubic root of 28047853 is about 303.8317867002.

It can be divided in two parts, 28047 and 853, that added together give a square (28900 = 170²).

The spelling of 28047853 in words is "twenty-eight million, forty-seven thousand, eight hundred fifty-three".