28565804 has 6 divisors (see below), whose sum is σ = 49990164. Its totient is φ = 14282900.

The previous prime is 28565791. The next prime is 28565809. The reversal of 28565804 is 40856582.

It is not an unprimeable number, because it can be changed into a prime (28565809) 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 as a sum of consecutive naturals, namely, 3570722 + ... + 3570729.

It is an arithmetic number, because the mean of its divisors is an integer number (8331694).

Almost surely, 2^28565804 is an apocalyptic number.

It is an amenable number.

28565804 is a deficient number, since it is larger than the sum of its proper divisors (21424360).

28565804 is a wasteful number, since it uses less digits than its factorization.

28565804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7141455 (or 7141453 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 38.

The square root of 28565804 is about 5344.6986818716. The cubic root of 28565804 is about 305.6906466796.

The spelling of 28565804 in words is "twenty-eight million, five hundred sixty-five thousand, eight hundred four".