2791678 has 4 divisors (see below), whose sum is σ = 4187520. Its totient is φ = 1395838.

The previous prime is 2791673. The next prime is 2791681. The reversal of 2791678 is 8761972.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 2791678.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2791673) 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 as a sum of consecutive naturals, namely, 697918 + ... + 697921.

It is an arithmetic number, because the mean of its divisors is an integer number (1046880).

2^2791678 is an apocalyptic number.

2791678 is a deficient number, since it is larger than the sum of its proper divisors (1395842).

2791678 is a wasteful number, since it uses less digits than its factorization.

2791678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1395841.

The product of its digits is 42336, while the sum is 40.

The square root of 2791678 is about 1670.8315295086. The cubic root of 2791678 is about 140.8061988813.

The spelling of 2791678 in words is "two million, seven hundred ninety-one thousand, six hundred seventy-eight".