2678865 has 32 divisors (see below), whose sum is σ = 5062656. Its totient is φ = 1183680.

The previous prime is 2678839. The next prime is 2678873. The reversal of 2678865 is 5688762.

It is not a de Polignac number, because 2678865 - 2⁷ = 2678737 is a prime.

2678865 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2844 + ... + 3666.

It is an arithmetic number, because the mean of its divisors is an integer number (158208).

2^2678865 is an apocalyptic number.

It is an amenable number.

2678865 is a deficient number, since it is larger than the sum of its proper divisors (2383791).

2678865 is a wasteful number, since it uses less digits than its factorization.

2678865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 869.

The product of its digits is 161280, while the sum is 42.

The square root of 2678865 is about 1636.7238618655. The cubic root of 2678865 is about 138.8833795741.

The spelling of 2678865 in words is "two million, six hundred seventy-eight thousand, eight hundred sixty-five".