2778056 has 8 divisors (see below), whose sum is σ = 5208870. Its totient is φ = 1389024.

The previous prime is 2778049. The next prime is 2778067. The reversal of 2778056 is 6508772.

It can be written as a sum of positive squares in only one way, i.e., 2775556 + 2500 = 1666^2 + 50^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 173621 + ... + 173636.

2^2778056 is an apocalyptic number.

It is an amenable number.

2778056 is a deficient number, since it is larger than the sum of its proper divisors (2430814).

2778056 is a wasteful number, since it uses less digits than its factorization.

2778056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347263 (or 347259 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 35.

The square root of 2778056 is about 1666.7501312434. The cubic root of 2778056 is about 140.5768039612.

The spelling of 2778056 in words is "two million, seven hundred seventy-eight thousand, fifty-six".