2628778219 has 2 divisors, whose sum is σ = 2628778220. Its totient is φ = 2628778218.

The previous prime is 2628778171. The next prime is 2628778343. The reversal of 2628778219 is 9128778262.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2628778219 - 2⁷ = 2628778091 is a prime.

It is a super-2 number, since 2×2628778219² = 13820949849377623922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2628772219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1314389109 + 1314389110.

It is an arithmetic number, because the mean of its divisors is an integer number (1314389110).

Almost surely, 2^2628778219 is an apocalyptic number.

2628778219 is a deficient number, since it is larger than the sum of its proper divisors (1).

2628778219 is an equidigital number, since it uses as much as digits as its factorization.

2628778219 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1354752, while the sum is 52.

The square root of 2628778219 is about 51271.6122137777. The cubic root of 2628778219 is about 1380.1236007405.

The spelling of 2628778219 in words is "two billion, six hundred twenty-eight million, seven hundred seventy-eight thousand, two hundred nineteen".