2680840 has 16 divisors (see below), whose sum is σ = 6031980. Its totient is φ = 1072320.

The previous prime is 2680837. The next prime is 2680877. The reversal of 2680840 is 480862.

It can be written as a sum of positive squares in 2 ways, for example, as 2452356 + 228484 = 1566^2 + 478^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2680799 and 2680808.

It is an unprimeable number.

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, 33471 + ... + 33550.

2^2680840 is an apocalyptic number.

2680840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2680840 is an abundant number, since it is smaller than the sum of its proper divisors (3351140).

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

2680840 is a wasteful number, since it uses less digits than its factorization.

2680840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67032 (or 67028 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 2680840 is about 1637.3270901075. The cubic root of 2680840 is about 138.9175018975.

The spelling of 2680840 in words is "two million, six hundred eighty thousand, eight hundred forty".