28560253 has 4 divisors (see below), whose sum is σ = 28768860. Its totient is φ = 28351648.

The previous prime is 28560251. The next prime is 28560353. The reversal of 28560253 is 35206582.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23551609 + 5008644 = 4853^2 + 2238^2 .

It is a cyclic number.

It is not a de Polignac number, because 28560253 - 2¹ = 28560251 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 (28560251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104098 + ... + 104371.

It is an arithmetic number, because the mean of its divisors is an integer number (7192215).

Almost surely, 2^28560253 is an apocalyptic number.

It is an amenable number.

28560253 is a deficient number, since it is larger than the sum of its proper divisors (208607).

28560253 is a wasteful number, since it uses less digits than its factorization.

28560253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208606.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 28560253 is about 5344.1793570201. The cubic root of 28560253 is about 305.6708444631.

The spelling of 28560253 in words is "twenty-eight million, five hundred sixty thousand, two hundred fifty-three".