28080916 has 24 divisors (see below), whose sum is σ = 50941184. Its totient is φ = 13530240.

The previous prime is 28080911. The next prime is 28080931. The reversal of 28080916 is 61908082.

It is a congruent number.

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

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53431 + ... + 53953.

Almost surely, 2^28080916 is an apocalyptic number.

It is an amenable number.

28080916 is a deficient number, since it is larger than the sum of its proper divisors (22860268).

28080916 is a wasteful number, since it uses less digits than its factorization.

28080916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 991 (or 989 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 28080916 is about 5299.1429495721. The cubic root of 28080916 is about 303.9511261458.

Adding to 28080916 its reverse (61908082), we get a palindrome (89988998).

It can be divided in two parts, 280809 and 16, that multiplied together give a palindrome (4492944).

The spelling of 28080916 in words is "twenty-eight million, eighty thousand, nine hundred sixteen".