28584789 has 8 divisors (see below), whose sum is σ = 38924160. Its totient is φ = 18650976.

The previous prime is 28584761. The next prime is 28584793. The reversal of 28584789 is 98748582.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28584789 - 2⁸ = 28584533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28584709) 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 7 ways as a sum of consecutive naturals, for example, 101224 + ... + 101505.

It is an arithmetic number, because the mean of its divisors is an integer number (4865520).

Almost surely, 2^28584789 is an apocalyptic number.

It is an amenable number.

28584789 is a deficient number, since it is larger than the sum of its proper divisors (10339371).

28584789 is a wasteful number, since it uses less digits than its factorization.

28584789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202779.

The product of its digits is 1290240, while the sum is 51.

The square root of 28584789 is about 5346.4744458381. The cubic root of 28584789 is about 305.7583529450.

The spelling of 28584789 in words is "twenty-eight million, five hundred eighty-four thousand, seven hundred eighty-nine".