28256793 has 8 divisors (see below), whose sum is σ = 38206656. Its totient is φ = 18572400.

The previous prime is 28256783. The next prime is 28256797. The reversal of 28256793 is 39765282.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28256793 - 2⁴ = 28256777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28256797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66118 + ... + 66543.

It is an arithmetic number, because the mean of its divisors is an integer number (4775832).

Almost surely, 2^28256793 is an apocalyptic number.

It is an amenable number.

28256793 is a deficient number, since it is larger than the sum of its proper divisors (9949863).

28256793 is a wasteful number, since it uses less digits than its factorization.

28256793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132735.

The product of its digits is 181440, while the sum is 42.

The square root of 28256793 is about 5315.7118996424. The cubic root of 28256793 is about 304.5843770041.

It can be divided in two parts, 282 and 56793, that added together give a palindrome (57075).

The spelling of 28256793 in words is "twenty-eight million, two hundred fifty-six thousand, seven hundred ninety-three".