2778106 has 16 divisors (see below), whose sum is σ = 4461480. Its totient is φ = 1292800.

The previous prime is 2778091. The next prime is 2778107. The reversal of 2778106 is 6018772.

It is a happy number.

2778106 is nontrivially palindromic in base 11.

It can be written as a sum of positive squares in 4 ways, for example, as 2588881 + 189225 = 1609^2 + 435^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2778107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3030 + ... + 3838.

2^2778106 is an apocalyptic number.

2778106 is a deficient number, since it is larger than the sum of its proper divisors (1683374).

2778106 is a wasteful number, since it uses less digits than its factorization.

2778106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 929.

The product of its (nonzero) digits is 4704, while the sum is 31.

The square root of 2778106 is about 1666.7651304248. The cubic root of 2778106 is about 140.5776473324.

The spelling of 2778106 in words is "two million, seven hundred seventy-eight thousand, one hundred six".