2678881 has 4 divisors (see below), whose sum is σ = 2715652. Its totient is φ = 2642112.

The previous prime is 2678873. The next prime is 2678887. The reversal of 2678881 is 1888762.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1030225 + 1648656 = 1015^2 + 1284^2 .

It is a cyclic number.

It is not a de Polignac number, because 2678881 - 2³ = 2678873 is a prime.

It is a super-2 number, since 2×2678881² = 14352806824322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2678887) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18276 + ... + 18421.

It is an arithmetic number, because the mean of its divisors is an integer number (678913).

2^2678881 is an apocalyptic number.

It is an amenable number.

2678881 is a deficient number, since it is larger than the sum of its proper divisors (36771).

2678881 is an equidigital number, since it uses as much as digits as its factorization.

2678881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36770.

The product of its digits is 43008, while the sum is 40.

The square root of 2678881 is about 1636.7287496711. The cubic root of 2678881 is about 138.8836560754.

The spelling of 2678881 in words is "two million, six hundred seventy-eight thousand, eight hundred eighty-one".