28256253 has 8 divisors (see below), whose sum is σ = 37833600. Its totient is φ = 18758208.

The previous prime is 28256251. The next prime is 28256269. The reversal of 28256253 is 35265282.

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

It is not a de Polignac number, because 28256253 - 2¹ = 28256251 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28256251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18988 + ... + 20421.

It is an arithmetic number, because the mean of its divisors is an integer number (4729200).

Almost surely, 2^28256253 is an apocalyptic number.

It is an amenable number.

28256253 is a deficient number, since it is larger than the sum of its proper divisors (9577347).

28256253 is a wasteful number, since it uses less digits than its factorization.

28256253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39651.

The product of its digits is 28800, while the sum is 33.

The square root of 28256253 is about 5315.6611065793. The cubic root of 28256253 is about 304.5824367437.

The spelling of 28256253 in words is "twenty-eight million, two hundred fifty-six thousand, two hundred fifty-three".