28104589 has 2 divisors, whose sum is σ = 28104590. Its totient is φ = 28104588.

The previous prime is 28104581. The next prime is 28104607. The reversal of 28104589 is 98540182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27352900 + 751689 = 5230^2 + 867^2 .

It is a cyclic number.

It is not a de Polignac number, because 28104589 - 2³ = 28104581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28104581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14052294 + 14052295.

It is an arithmetic number, because the mean of its divisors is an integer number (14052295).

Almost surely, 2^28104589 is an apocalyptic number.

It is an amenable number.

28104589 is a deficient number, since it is larger than the sum of its proper divisors (1).

28104589 is an equidigital number, since it uses as much as digits as its factorization.

28104589 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 28104589 is about 5301.3761420974. The cubic root of 28104589 is about 304.0365152640.

The spelling of 28104589 in words is "twenty-eight million, one hundred four thousand, five hundred eighty-nine".