28171713 has 4 divisors (see below), whose sum is σ = 37562288. Its totient is φ = 18781140.

The previous prime is 28171697. The next prime is 28171729. The reversal of 28171713 is 31717182.

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 an interprime number because it is at equal distance from previous prime (28171697) and next prime (28171729).

It is not a de Polignac number, because 28171713 - 2⁴ = 28171697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28171783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4695283 + ... + 4695288.

It is an arithmetic number, because the mean of its divisors is an integer number (9390572).

Almost surely, 2^28171713 is an apocalyptic number.

It is an amenable number.

28171713 is a deficient number, since it is larger than the sum of its proper divisors (9390575).

28171713 is an equidigital number, since it uses as much as digits as its factorization.

28171713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9390574.

The product of its digits is 2352, while the sum is 30.

The square root of 28171713 is about 5307.7031755742. The cubic root of 28171713 is about 304.2783728151.

Adding to 28171713 its reverse (31717182), we get a palindrome (59888895).

The spelling of 28171713 in words is "twenty-eight million, one hundred seventy-one thousand, seven hundred thirteen".