28116615 has 8 divisors (see below), whose sum is σ = 44986608. Its totient is φ = 14995520.

The previous prime is 28116593. The next prime is 28116619. The reversal of 28116615 is 51661182.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28116615 - 2¹⁷ = 27985543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28116619) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 937206 + ... + 937235.

It is an arithmetic number, because the mean of its divisors is an integer number (5623326).

Almost surely, 2^28116615 is an apocalyptic number.

28116615 is a deficient number, since it is larger than the sum of its proper divisors (16869993).

28116615 is a wasteful number, since it uses less digits than its factorization.

28116615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1874449.

The product of its digits is 2880, while the sum is 30.

The square root of 28116615 is about 5302.5102545870. The cubic root of 28116615 is about 304.0798749889.

Adding to 28116615 its reverse (51661182), we get a palindrome (79777797).

The spelling of 28116615 in words is "twenty-eight million, one hundred sixteen thousand, six hundred fifteen".