2791778 has 16 divisors (see below), whose sum is σ = 4612896. Its totient is φ = 1256640.

The previous prime is 2791777. The next prime is 2791783. The reversal of 2791778 is 8771972.

It is not an unprimeable number, because it can be changed into a prime (2791777) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1925 + ... + 3047.

It is an arithmetic number, because the mean of its divisors is an integer number (288306).

2^2791778 is an apocalyptic number.

2791778 is a deficient number, since it is larger than the sum of its proper divisors (1821118).

2791778 is a wasteful number, since it uses less digits than its factorization.

2791778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1249.

The product of its digits is 49392, while the sum is 41.

The square root of 2791778 is about 1670.8614544599. The cubic root of 2791778 is about 140.8078801224.

The spelling of 2791778 in words is "two million, seven hundred ninety-one thousand, seven hundred seventy-eight".