28560313 has 8 divisors (see below), whose sum is σ = 29330280. Its totient is φ = 27793920.

The previous prime is 28560251. The next prime is 28560353. The reversal of 28560313 is 31306582.

It can be written as a sum of positive squares in 4 ways, for example, as 5212089 + 23348224 = 2283^2 + 4832^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 28560313 - 2⁹ = 28559801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28560353) 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, 24733 + ... + 25861.

It is an arithmetic number, because the mean of its divisors is an integer number (3666285).

Almost surely, 2^28560313 is an apocalyptic number.

It is an amenable number.

28560313 is a deficient number, since it is larger than the sum of its proper divisors (769967).

28560313 is a wasteful number, since it uses less digits than its factorization.

28560313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1787.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 28560313 is about 5344.1849706012. The cubic root of 28560313 is about 305.6710585163.

Adding to 28560313 its reverse (31306582), we get a palindrome (59866895).

The spelling of 28560313 in words is "twenty-eight million, five hundred sixty thousand, three hundred thirteen".