28198663 has 2 divisors, whose sum is σ = 28198664. Its totient is φ = 28198662.

The previous prime is 28198649. The next prime is 28198691. The reversal of 28198663 is 36689182.

28198663 is nontrivially palindromic in base 14.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28198663 - 2¹⁷ = 28067591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28198633) 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, 14099331 + 14099332.

It is an arithmetic number, because the mean of its divisors is an integer number (14099332).

Almost surely, 2^28198663 is an apocalyptic number.

28198663 is a deficient number, since it is larger than the sum of its proper divisors (1).

28198663 is an equidigital number, since it uses as much as digits as its factorization.

28198663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 43.

The square root of 28198663 is about 5310.2413316157. The cubic root of 28198663 is about 304.3753695040.

The spelling of 28198663 in words is "twenty-eight million, one hundred ninety-eight thousand, six hundred sixty-three".