28298861 has 2 divisors, whose sum is σ = 28298862. Its totient is φ = 28298860.

The previous prime is 28298843. The next prime is 28298869. The reversal of 28298861 is 16889282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27237961 + 1060900 = 5219^2 + 1030^2 .

It is a cyclic number.

It is not a de Polignac number, because 28298861 - 2⁶ = 28298797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28298869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14149430 + 14149431.

It is an arithmetic number, because the mean of its divisors is an integer number (14149431).

Almost surely, 2^28298861 is an apocalyptic number.

It is an amenable number.

28298861 is a deficient number, since it is larger than the sum of its proper divisors (1).

28298861 is an equidigital number, since it uses as much as digits as its factorization.

28298861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 110592, while the sum is 44.

The square root of 28298861 is about 5319.6673768197. The cubic root of 28298861 is about 304.7354545656.

The spelling of 28298861 in words is "twenty-eight million, two hundred ninety-eight thousand, eight hundred sixty-one".