28315516 has 12 divisors (see below), whose sum is σ = 50392440. Its totient is φ = 13917680.

The previous prime is 28315499. The next prime is 28315537. The reversal of 28315516 is 61551382.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 59755 + ... + 60226.

It is an arithmetic number, because the mean of its divisors is an integer number (4199370).

Almost surely, 2^28315516 is an apocalyptic number.

It is an amenable number.

28315516 is a deficient number, since it is larger than the sum of its proper divisors (22076924).

28315516 is a wasteful number, since it uses less digits than its factorization.

28315516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120044 (or 120042 counting only the distinct ones).

The product of its digits is 7200, while the sum is 31.

The square root of 28315516 is about 5321.2325639836. The cubic root of 28315516 is about 304.7952258009.

Adding to 28315516 its reverse (61551382), we get a palindrome (89866898).

The spelling of 28315516 in words is "twenty-eight million, three hundred fifteen thousand, five hundred sixteen".