2678 has 8 divisors (see below), whose sum is σ = 4368. Its totient is φ = 1224.

The previous prime is 2677. The next prime is 2683. The reversal of 2678 is 8762.

2678 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

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

2678 is a modest number, since divided by 78 gives 26 as remainder.

2678 is strictly pandigital in base 5.

It is a plaindrome in base 10.

It is a nialpdrome in base 14 and base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2671) 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 3 ways as a sum of consecutive naturals, for example, 26 + ... + 77.

It is an arithmetic number, because the mean of its divisors is an integer number (546).

2²⁶⁷⁸ is an apocalyptic number.

2678 is a deficient number, since it is larger than the sum of its proper divisors (1690).

2678 is a wasteful number, since it uses less digits than its factorization.

2678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118.

The product of its digits is 672, while the sum is 23.

The square root of 2678 is about 51.7493961317. The cubic root of 2678 is about 13.8868429579.

Adding to 2678 its sum of digits (23), we get a triangular number (2701 = T₇₃).

Subtracting 2678 from its reverse (8762), we obtain a square (6084 = 78²).

The spelling of 2678 in words is "two thousand, six hundred seventy-eight".