2678840 has 32 divisors (see below), whose sum is σ = 6076080. Its totient is φ = 1062912.

The previous prime is 2678839. The next prime is 2678873. The reversal of 2678840 is 488762.

It is a self number, because there is not a number n which added to its sum of digits gives 2678840.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7547 + ... + 7893.

2^2678840 is an apocalyptic number.

2678840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2678840 is an abundant number, since it is smaller than the sum of its proper divisors (3397240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2678840 is a wasteful number, since it uses less digits than its factorization.

2678840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551 (or 547 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 2678840 is about 1636.7162246401. The cubic root of 2678840 is about 138.8829475384.

The spelling of 2678840 in words is "two million, six hundred seventy-eight thousand, eight hundred forty".