28011713 has 4 divisors (see below), whose sum is σ = 28183728. Its totient is φ = 27839700.

The previous prime is 28011707. The next prime is 28011721. The reversal of 28011713 is 31711082.

It is a happy number.

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 28011713 - 2¹⁴ = 27995329 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28011703) 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, 85763 + ... + 86088.

It is an arithmetic number, because the mean of its divisors is an integer number (7045932).

Almost surely, 2^28011713 is an apocalyptic number.

It is an amenable number.

28011713 is a deficient number, since it is larger than the sum of its proper divisors (172015).

28011713 is a wasteful number, since it uses less digits than its factorization.

28011713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172014.

The product of its (nonzero) digits is 336, while the sum is 23.

The square root of 28011713 is about 5292.6092808746. The cubic root of 28011713 is about 303.7012336259.

Adding to 28011713 its reverse (31711082), we get a palindrome (59722795).

The spelling of 28011713 in words is "twenty-eight million, eleven thousand, seven hundred thirteen".