28005316 has 12 divisors (see below), whose sum is σ = 51588880. Its totient is φ = 13265640.

The previous prime is 28005269. The next prime is 28005317. The reversal of 28005316 is 61350082.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (28005317) 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 3 ways as a sum of consecutive naturals, for example, 184170 + ... + 184321.

Almost surely, 2^28005316 is an apocalyptic number.

It is an amenable number.

28005316 is a deficient number, since it is larger than the sum of its proper divisors (23583564).

28005316 is a wasteful number, since it uses less digits than its factorization.

28005316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368514 (or 368512 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 28005316 is about 5292.0049130741. The cubic root of 28005316 is about 303.6781132417.

Adding to 28005316 its reverse (61350082), we get a palindrome (89355398).

The spelling of 28005316 in words is "twenty-eight million, five thousand, three hundred sixteen".