28659115 has 4 divisors (see below), whose sum is σ = 34390944. Its totient is φ = 22927288.

The previous prime is 28659109. The next prime is 28659119. The reversal of 28659115 is 51195682.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51195682 = 2 ⋅25597841.

It is a cyclic number.

It is not a de Polignac number, because 28659115 - 2⁵ = 28659083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28659119) 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, 2865907 + ... + 2865916.

It is an arithmetic number, because the mean of its divisors is an integer number (8597736).

Almost surely, 2^28659115 is an apocalyptic number.

28659115 is a deficient number, since it is larger than the sum of its proper divisors (5731829).

28659115 is an equidigital number, since it uses as much as digits as its factorization.

28659115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5731828.

The product of its digits is 21600, while the sum is 37.

The square root of 28659115 is about 5353.4208689398. The cubic root of 28659115 is about 306.0231339396.

The spelling of 28659115 in words is "twenty-eight million, six hundred fifty-nine thousand, one hundred fifteen".