28798219 has 2 divisors, whose sum is σ = 28798220. Its totient is φ = 28798218.

The previous prime is 28798213. The next prime is 28798271. The reversal of 28798219 is 91289782.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28798219 - 2⁹ = 28797707 is a prime.

It is a super-2 number, since 2×28798219² = 1658674835143922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28798213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14399109 + 14399110.

It is an arithmetic number, because the mean of its divisors is an integer number (14399110).

Almost surely, 2^28798219 is an apocalyptic number.

28798219 is a deficient number, since it is larger than the sum of its proper divisors (1).

28798219 is an equidigital number, since it uses as much as digits as its factorization.

28798219 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 46.

The square root of 28798219 is about 5366.3972085562. The cubic root of 28798219 is about 306.5174543221.

The spelling of 28798219 in words is "twenty-eight million, seven hundred ninety-eight thousand, two hundred nineteen".