28163804 has 6 divisors (see below), whose sum is σ = 49286664. Its totient is φ = 14081900.

The previous prime is 28163803. The next prime is 28163851. The reversal of 28163804 is 40836182.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28163801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3520472 + ... + 3520479.

It is an arithmetic number, because the mean of its divisors is an integer number (8214444).

Almost surely, 2^28163804 is an apocalyptic number.

It is an amenable number.

28163804 is a deficient number, since it is larger than the sum of its proper divisors (21122860).

28163804 is a wasteful number, since it uses less digits than its factorization.

28163804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7040955 (or 7040953 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 28163804 is about 5306.9580740760. The cubic root of 28163804 is about 304.2498955160.

Adding to 28163804 its reverse (40836182), we get a palindrome (68999986).

The spelling of 28163804 in words is "twenty-eight million, one hundred sixty-three thousand, eight hundred four".