28582789 has 2 divisors, whose sum is σ = 28582790. Its totient is φ = 28582788.

The previous prime is 28582787. The next prime is 28582861. The reversal of 28582789 is 98728582.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28408900 + 173889 = 5330^2 + 417^2 .

It is a cyclic number.

It is not a de Polignac number, because 28582789 - 2¹ = 28582787 is a prime.

Together with 28582787, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28582787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14291394 + 14291395.

It is an arithmetic number, because the mean of its divisors is an integer number (14291395).

Almost surely, 2^28582789 is an apocalyptic number.

It is an amenable number.

28582789 is a deficient number, since it is larger than the sum of its proper divisors (1).

28582789 is an equidigital number, since it uses as much as digits as its factorization.

28582789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 645120, while the sum is 49.

The square root of 28582789 is about 5346.2874034231. The cubic root of 28582789 is about 305.7512217516.

The spelling of 28582789 in words is "twenty-eight million, five hundred eighty-two thousand, seven hundred eighty-nine".