28598989 has 2 divisors, whose sum is σ = 28598990. Its totient is φ = 28598988.

The previous prime is 28598939. The next prime is 28599041. The reversal of 28598989 is 98989582.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27910089 + 688900 = 5283^2 + 830^2 .

It is a cyclic number.

It is not a de Polignac number, because 28598989 - 2⁷ = 28598861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28598939) 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, 14299494 + 14299495.

It is an arithmetic number, because the mean of its divisors is an integer number (14299495).

Almost surely, 2^28598989 is an apocalyptic number.

It is an amenable number.

28598989 is a deficient number, since it is larger than the sum of its proper divisors (1).

28598989 is an equidigital number, since it uses as much as digits as its factorization.

28598989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3732480, while the sum is 58.

The square root of 28598989 is about 5347.8022588723. The cubic root of 28598989 is about 305.8089748551.

The spelling of 28598989 in words is "twenty-eight million, five hundred ninety-eight thousand, nine hundred eighty-nine".