28513804 has 12 divisors (see below), whose sum is σ = 54435528. Its totient is φ = 12960800.

The previous prime is 28513801. The next prime is 28513861. The reversal of 28513804 is 40831582.

It is not an unprimeable number, because it can be changed into a prime (28513801) 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 in 3 ways as a sum of consecutive naturals, for example, 323977 + ... + 324064.

It is an arithmetic number, because the mean of its divisors is an integer number (4536294).

Almost surely, 2^28513804 is an apocalyptic number.

It is an amenable number.

28513804 is a deficient number, since it is larger than the sum of its proper divisors (25921724).

28513804 is a wasteful number, since it uses less digits than its factorization.

28513804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648056 (or 648054 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 28513804 is about 5339.8318325580. The cubic root of 28513804 is about 305.5050451726.

The spelling of 28513804 in words is "twenty-eight million, five hundred thirteen thousand, eight hundred four".