28565713 has 4 divisors (see below), whose sum is σ = 31162608. Its totient is φ = 25968820.

The previous prime is 28565687. The next prime is 28565723. The reversal of 28565713 is 31756582.

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 not a de Polignac number, because 28565713 - 2⁵ = 28565681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28565723) 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 3 ways as a sum of consecutive naturals, for example, 1298431 + ... + 1298452.

It is an arithmetic number, because the mean of its divisors is an integer number (7790652).

Almost surely, 2^28565713 is an apocalyptic number.

It is an amenable number.

28565713 is a deficient number, since it is larger than the sum of its proper divisors (2596895).

28565713 is a wasteful number, since it uses less digits than its factorization.

28565713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2596894.

The product of its digits is 50400, while the sum is 37.

The square root of 28565713 is about 5344.6901687563. The cubic root of 28565713 is about 305.6903220738.

It can be divided in two parts, 2856 and 5713, that multiplied together give a triangular number (16316328 = T₅₇₁₂).

The spelling of 28565713 in words is "twenty-eight million, five hundred sixty-five thousand, seven hundred thirteen".