2783278 has 8 divisors (see below), whose sum is σ = 4182768. Its totient is φ = 1389024.

The previous prime is 2783267. The next prime is 2783281. The reversal of 2783278 is 8723872.

2783278 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an Ulam number.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

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, 550 + ... + 2422.

It is an arithmetic number, because the mean of its divisors is an integer number (522846).

2^2783278 is an apocalyptic number.

2783278 is a deficient number, since it is larger than the sum of its proper divisors (1399490).

2783278 is a wasteful number, since it uses less digits than its factorization.

2783278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2618.

The product of its digits is 37632, while the sum is 37.

The square root of 2783278 is about 1668.3159173250. The cubic root of 2783278 is about 140.6648310545.

The spelling of 2783278 in words is "two million, seven hundred eighty-three thousand, two hundred seventy-eight".