28198799 has 2 divisors, whose sum is σ = 28198800. Its totient is φ = 28198798.

The previous prime is 28198783. The next prime is 28198823. The reversal of 28198799 is 99789182.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28198799 - 2⁴ = 28198783 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28198799.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28198739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14099399 + 14099400.

It is an arithmetic number, because the mean of its divisors is an integer number (14099400).

Almost surely, 2^28198799 is an apocalyptic number.

28198799 is a deficient number, since it is larger than the sum of its proper divisors (1).

28198799 is an equidigital number, since it uses as much as digits as its factorization.

28198799 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 53.

The square root of 28198799 is about 5310.2541370447. The cubic root of 28198799 is about 304.3758588296.

The spelling of 28198799 in words is "twenty-eight million, one hundred ninety-eight thousand, seven hundred ninety-nine".