28068713 has 4 divisors (see below), whose sum is σ = 28088448. Its totient is φ = 28048980.

The previous prime is 28068707. The next prime is 28068721. The reversal of 28068713 is 31786082.

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 28068713 - 2⁸ = 28068457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28068413) 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, 7553 + ... + 10638.

It is an arithmetic number, because the mean of its divisors is an integer number (7022112).

Almost surely, 2^28068713 is an apocalyptic number.

It is an amenable number.

28068713 is a deficient number, since it is larger than the sum of its proper divisors (19735).

28068713 is a wasteful number, since it uses less digits than its factorization.

28068713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19734.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 28068713 is about 5297.9914118466. The cubic root of 28068713 is about 303.9070908657.

The spelling of 28068713 in words is "twenty-eight million, sixty-eight thousand, seven hundred thirteen".