28680803 has 4 divisors (see below), whose sum is σ = 28708848. Its totient is φ = 28652760.

The previous prime is 28680781. The next prime is 28680811. The reversal of 28680803 is 30808682.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28680803 - 2¹² = 28676707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28680403) 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, 12428 + ... + 14553.

It is an arithmetic number, because the mean of its divisors is an integer number (7177212).

Almost surely, 2^28680803 is an apocalyptic number.

28680803 is a deficient number, since it is larger than the sum of its proper divisors (28045).

28680803 is a wasteful number, since it uses less digits than its factorization.

28680803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28044.

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 28680803 is about 5355.4461065349. The cubic root of 28680803 is about 306.1003095749.

The spelling of 28680803 in words is "twenty-eight million, six hundred eighty thousand, eight hundred three".