2773856 has 24 divisors (see below), whose sum is σ = 5783400. Its totient is φ = 1305088.

The previous prime is 2773843. The next prime is 2773871. The reversal of 2773856 is 6583772.

It is a happy number.

It is a d-powerful number, because it can be written as 2¹⁹ + 7³ + 7⁶ + 3¹¹ + 8 + 5⁹ + 6⁴ .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2006 + ... + 3093.

It is an arithmetic number, because the mean of its divisors is an integer number (240975).

2^2773856 is an apocalyptic number.

It is an amenable number.

2773856 is an abundant number, since it is smaller than the sum of its proper divisors (3009544).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2773856 is a wasteful number, since it uses less digits than its factorization.

2773856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5126 (or 5118 counting only the distinct ones).

The product of its digits is 70560, while the sum is 38.

The square root of 2773856 is about 1665.4897177707. The cubic root of 2773856 is about 140.5059246160.

The spelling of 2773856 in words is "two million, seven hundred seventy-three thousand, eight hundred fifty-six".