28856783 has 2 divisors, whose sum is σ = 28856784. Its totient is φ = 28856782.

The previous prime is 28856777. The next prime is 28856797. The reversal of 28856783 is 38765882.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28856783 - 2⁴ = 28856767 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28856713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14428391 + 14428392.

It is an arithmetic number, because the mean of its divisors is an integer number (14428392).

Almost surely, 2^28856783 is an apocalyptic number.

28856783 is a deficient number, since it is larger than the sum of its proper divisors (1).

28856783 is an equidigital number, since it uses as much as digits as its factorization.

28856783 is an evil number, because the sum of its binary digits is even.

The product of its digits is 645120, while the sum is 47.

The square root of 28856783 is about 5371.8509845304. The cubic root of 28856783 is about 306.7250913942.

Subtracting 28856783 from its reverse (38765882), we obtain a palindrome (9909099).

The spelling of 28856783 in words is "twenty-eight million, eight hundred fifty-six thousand, seven hundred eighty-three".