2684840 has 16 divisors (see below), whose sum is σ = 6040980. Its totient is φ = 1073920.

The previous prime is 2684837. The next prime is 2684881. The reversal of 2684840 is 484862.

It can be written as a sum of positive squares in 2 ways, for example, as 2669956 + 14884 = 1634^2 + 122^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2684797 and 2684806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33521 + ... + 33600.

2^2684840 is an apocalyptic number.

2684840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2684840 is an abundant number, since it is smaller than the sum of its proper divisors (3356140).

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

2684840 is a wasteful number, since it uses less digits than its factorization.

2684840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67132 (or 67128 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 32.

The square root of 2684840 is about 1638.5481378342. The cubic root of 2684840 is about 138.9865590923.

The spelling of 2684840 in words is "two million, six hundred eighty-four thousand, eight hundred forty".