28716783 has 4 divisors (see below), whose sum is σ = 38289048. Its totient is φ = 19144520.

The previous prime is 28716763. The next prime is 28716823. The reversal of 28716783 is 38761782.

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 28716783 - 2⁹ = 28716271 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28716763) 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 in 3 ways as a sum of consecutive naturals, for example, 4786128 + ... + 4786133.

It is an arithmetic number, because the mean of its divisors is an integer number (9572262).

Almost surely, 2^28716783 is an apocalyptic number.

28716783 is a deficient number, since it is larger than the sum of its proper divisors (9572265).

28716783 is an equidigital number, since it uses as much as digits as its factorization.

28716783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9572264.

The product of its digits is 112896, while the sum is 42.

The square root of 28716783 is about 5358.8042509500. The cubic root of 28716783 is about 306.2282567931.

The spelling of 28716783 in words is "twenty-eight million, seven hundred sixteen thousand, seven hundred eighty-three".