28112313 has 8 divisors (see below), whose sum is σ = 38190528. Its totient is φ = 18387824.

The previous prime is 28112311. The next prime is 28112317. The reversal of 28112313 is 31321182.

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 28112313 - 2¹ = 28112311 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28112313.

It is not an unprimeable number, because it can be changed into a prime (28112311) 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, 88245 + ... + 88562.

It is an arithmetic number, because the mean of its divisors is an integer number (4773816).

Almost surely, 2^28112313 is an apocalyptic number.

It is an amenable number.

28112313 is a deficient number, since it is larger than the sum of its proper divisors (10078215).

28112313 is a wasteful number, since it uses less digits than its factorization.

28112313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176863.

The product of its digits is 288, while the sum is 21.

The square root of 28112313 is about 5302.1045821447. The cubic root of 28112313 is about 304.0643655550.

Adding to 28112313 its reverse (31321182), we get a palindrome (59433495).

The spelling of 28112313 in words is "twenty-eight million, one hundred twelve thousand, three hundred thirteen".