28080915 has 16 divisors (see below), whose sum is σ = 45007008. Its totient is φ = 14950656.

The previous prime is 28080911. The next prime is 28080931. The reversal of 28080915 is 51908082.

It is a happy number.

It is not a de Polignac number, because 28080915 - 2² = 28080911 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28080911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10119 + ... + 12591.

It is an arithmetic number, because the mean of its divisors is an integer number (2812938).

Almost surely, 2^28080915 is an apocalyptic number.

28080915 is a deficient number, since it is larger than the sum of its proper divisors (16926093).

28080915 is a wasteful number, since it uses less digits than its factorization.

28080915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3238.

The product of its (nonzero) digits is 5760, while the sum is 33.

The square root of 28080915 is about 5299.1428552172. The cubic root of 28080915 is about 303.9511225377.

Adding to 28080915 its reverse (51908082), we get a palindrome (79988997).

The spelling of 28080915 in words is "twenty-eight million, eighty thousand, nine hundred fifteen".