28898489 has 2 divisors, whose sum is σ = 28898490. Its totient is φ = 28898488.

The previous prime is 28898483. The next prime is 28898497. The reversal of 28898489 is 98489882.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21086464 + 7812025 = 4592^2 + 2795^2 .

It is a cyclic number.

It is not a de Polignac number, because 28898489 - 2⁴ = 28898473 is a prime.

It is not a weakly prime, because it can be changed into another prime (28898483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14449244 + 14449245.

It is an arithmetic number, because the mean of its divisors is an integer number (14449245).

Almost surely, 2^28898489 is an apocalyptic number.

It is an amenable number.

28898489 is a deficient number, since it is larger than the sum of its proper divisors (1).

28898489 is an equidigital number, since it uses as much as digits as its factorization.

28898489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2654208, while the sum is 56.

The square root of 28898489 is about 5375.7314851097. The cubic root of 28898489 is about 306.8727876778.

The spelling of 28898489 in words is "twenty-eight million, eight hundred ninety-eight thousand, four hundred eighty-nine".