28685803 has 2 divisors, whose sum is σ = 28685804. Its totient is φ = 28685802.

The previous prime is 28685791. The next prime is 28685827. The reversal of 28685803 is 30858682.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28685803 - 2⁵ = 28685771 is a prime.

It is not a weakly prime, because it can be changed into another prime (28685863) 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, 14342901 + 14342902.

It is an arithmetic number, because the mean of its divisors is an integer number (14342902).

Almost surely, 2^28685803 is an apocalyptic number.

28685803 is a deficient number, since it is larger than the sum of its proper divisors (1).

28685803 is an equidigital number, since it uses as much as digits as its factorization.

28685803 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 92160, while the sum is 40.

The square root of 28685803 is about 5355.9129007108. The cubic root of 28685803 is about 306.1180962993.

The spelling of 28685803 in words is "twenty-eight million, six hundred eighty-five thousand, eight hundred three".