28205783 has 2 divisors, whose sum is σ = 28205784. Its totient is φ = 28205782.

The previous prime is 28205767. The next prime is 28205789. The reversal of 28205783 is 38750282.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28205783 - 2⁴ = 28205767 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28205789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14102891 + 14102892.

It is an arithmetic number, because the mean of its divisors is an integer number (14102892).

Almost surely, 2^28205783 is an apocalyptic number.

28205783 is a deficient number, since it is larger than the sum of its proper divisors (1).

28205783 is an equidigital number, since it uses as much as digits as its factorization.

28205783 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 28205783 is about 5310.9116919791. The cubic root of 28205783 is about 304.4009850241.

The spelling of 28205783 in words is "twenty-eight million, two hundred five thousand, seven hundred eighty-three".