2778113 has 8 divisors (see below), whose sum is σ = 3095400. Its totient is φ = 2475648.

The previous prime is 2778109. The next prime is 2778121. The reversal of 2778113 is 3118772.

It can be written as a sum of positive squares in 4 ways, for example, as 552049 + 2226064 = 743^2 + 1492^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2778113 - 2² = 2778109 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2778143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3308 + ... + 4061.

It is an arithmetic number, because the mean of its divisors is an integer number (386925).

2^2778113 is an apocalyptic number.

It is an amenable number.

2778113 is a deficient number, since it is larger than the sum of its proper divisors (317287).

2778113 is a wasteful number, since it uses less digits than its factorization.

2778113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7411.

The product of its digits is 2352, while the sum is 29.

The square root of 2778113 is about 1666.7672302994. The cubic root of 2778113 is about 140.5777654036.

The spelling of 2778113 in words is "two million, seven hundred seventy-eight thousand, one hundred thirteen".