28315316 has 6 divisors (see below), whose sum is σ = 49551810. Its totient is φ = 14157656.

The previous prime is 28315289. The next prime is 28315327. The reversal of 28315316 is 61351382.

It can be written as a sum of positive squares in only one way, i.e., 16728100 + 11587216 = 4090^2 + 3404^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3539411 + ... + 3539418.

It is an arithmetic number, because the mean of its divisors is an integer number (8258635).

Almost surely, 2^28315316 is an apocalyptic number.

It is an amenable number.

28315316 is a deficient number, since it is larger than the sum of its proper divisors (21236494).

28315316 is a wasteful number, since it uses less digits than its factorization.

28315316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7078833 (or 7078831 counting only the distinct ones).

The product of its digits is 4320, while the sum is 29.

The square root of 28315316 is about 5321.2137713120. The cubic root of 28315316 is about 304.7945081827.

Adding to 28315316 its reverse (61351382), we get a palindrome (89666698).

The spelling of 28315316 in words is "twenty-eight million, three hundred fifteen thousand, three hundred sixteen".