2778219 has 28 divisors (see below), whose sum is σ = 4319536. Its totient is φ = 1784592.

The previous prime is 2778203. The next prime is 2778227. The reversal of 2778219 is 9128772.

2778219 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2778219 - 2⁴ = 2778203 is a prime.

It is a super-2 number, since 2×2778219² = 15437001623922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2778299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 26922 + ... + 27024.

2^2778219 is an apocalyptic number.

2778219 is a deficient number, since it is larger than the sum of its proper divisors (1541317).

2778219 is an equidigital number, since it uses as much as digits as its factorization.

2778219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158 (or 143 counting only the distinct ones).

The product of its digits is 14112, while the sum is 36.

The square root of 2778219 is about 1666.7990280775. The cubic root of 2778219 is about 140.5795533143.

The spelling of 2778219 in words is "two million, seven hundred seventy-eight thousand, two hundred nineteen".