28014689 has 2 divisors, whose sum is σ = 28014690. Its totient is φ = 28014688.

The previous prime is 28014659. The next prime is 28014697. The reversal of 28014689 is 98641082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23571025 + 4443664 = 4855^2 + 2108^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28014689 is a prime.

It is not a weakly prime, because it can be changed into another prime (28014659) 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 as a sum of consecutive naturals, namely, 14007344 + 14007345.

It is an arithmetic number, because the mean of its divisors is an integer number (14007345).

Almost surely, 2^28014689 is an apocalyptic number.

It is an amenable number.

28014689 is a deficient number, since it is larger than the sum of its proper divisors (1).

28014689 is an equidigital number, since it uses as much as digits as its factorization.

28014689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 28014689 is about 5292.8904201769. The cubic root of 28014689 is about 303.7119884468.

The spelling of 28014689 in words is "twenty-eight million, fourteen thousand, six hundred eighty-nine".