2778956 has 12 divisors (see below), whose sum is σ = 5149368. Its totient is φ = 1307712.

The previous prime is 2778917. The next prime is 2778967. The reversal of 2778956 is 6598772.

2778956 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a d-powerful number, because it can be written as 2¹¹ + 7 + 7⁷ + 8 + 9 + 5⁹ + 6³ .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 20366 + ... + 20501.

It is an arithmetic number, because the mean of its divisors is an integer number (429114).

2^2778956 is an apocalyptic number.

It is an amenable number.

2778956 is a deficient number, since it is larger than the sum of its proper divisors (2370412).

2778956 is a wasteful number, since it uses less digits than its factorization.

2778956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40888 (or 40886 counting only the distinct ones).

The product of its digits is 211680, while the sum is 44.

The square root of 2778956 is about 1667.0200958597. The cubic root of 2778956 is about 140.5919830964.

The spelling of 2778956 in words is "two million, seven hundred seventy-eight thousand, nine hundred fifty-six".