28716105 has 32 divisors (see below), whose sum is σ = 50780160. Its totient is φ = 13740480.

The previous prime is 28716101. The next prime is 28716139. The reversal of 28716105 is 50161782.

It is not a de Polignac number, because 28716105 - 2² = 28716101 is a prime.

It is a super-2 number, since 2×28716105² = 1649229372742050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28716101) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11934 + ... + 14136.

It is an arithmetic number, because the mean of its divisors is an integer number (1586880).

Almost surely, 2^28716105 is an apocalyptic number.

It is an amenable number.

28716105 is a deficient number, since it is larger than the sum of its proper divisors (22064055).

28716105 is a wasteful number, since it uses less digits than its factorization.

28716105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2301.

The product of its (nonzero) digits is 3360, while the sum is 30.

The square root of 28716105 is about 5358.7409901954. The cubic root of 28716105 is about 306.2258467693.

Adding to 28716105 its reverse (50161782), we get a palindrome (78877887).

The spelling of 28716105 in words is "twenty-eight million, seven hundred sixteen thousand, one hundred five".