28790219 has 2 divisors, whose sum is σ = 28790220. Its totient is φ = 28790218.

The previous prime is 28790213. The next prime is 28790221. The reversal of 28790219 is 91209782.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28790219 - 2¹² = 28786123 is a prime.

It is a super-2 number, since 2×28790219² = 1657753420135922, which contains 22 as substring.

Together with 28790221, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28790213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14395109 + 14395110.

It is an arithmetic number, because the mean of its divisors is an integer number (14395110).

Almost surely, 2^28790219 is an apocalyptic number.

28790219 is a deficient number, since it is larger than the sum of its proper divisors (1).

28790219 is an equidigital number, since it uses as much as digits as its factorization.

28790219 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 28790219 is about 5365.6517777433. The cubic root of 28790219 is about 306.4890686925.

The spelling of 28790219 in words is "twenty-eight million, seven hundred ninety thousand, two hundred nineteen".