28615316 has 6 divisors (see below), whose sum is σ = 50076810. Its totient is φ = 14307656.

The previous prime is 28615313. The next prime is 28615333. The reversal of 28615316 is 61351682.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 24010000 + 4605316 = 4900^2 + 2146^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28615313) by changing a digit.

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, 3576911 + ... + 3576918.

It is an arithmetic number, because the mean of its divisors is an integer number (8346135).

Almost surely, 2^28615316 is an apocalyptic number.

It is an amenable number.

28615316 is a deficient number, since it is larger than the sum of its proper divisors (21461494).

28615316 is a wasteful number, since it uses less digits than its factorization.

28615316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7153833 (or 7153831 counting only the distinct ones).

The product of its digits is 8640, while the sum is 32.

The square root of 28615316 is about 5349.3285559965. The cubic root of 28615316 is about 305.8671586518.

Adding to 28615316 its reverse (61351682), we get a palindrome (89966998).

The spelling of 28615316 in words is "twenty-eight million, six hundred fifteen thousand, three hundred sixteen".