2680820 has 24 divisors (see below), whose sum is σ = 5660928. Its totient is φ = 1066400.

The previous prime is 2680819. The next prime is 2680823. The reversal of 2680820 is 280862.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 2680820.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2680823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6005 + ... + 6435.

It is an arithmetic number, because the mean of its divisors is an integer number (235872).

2^2680820 is an apocalyptic number.

2680820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2680820 is an abundant number, since it is smaller than the sum of its proper divisors (2980108).

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

2680820 is a wasteful number, since it uses less digits than its factorization.

2680820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 751 (or 749 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 2680820 is about 1637.3209825810. The cubic root of 2680820 is about 138.9171564390.

The spelling of 2680820 in words is "two million, six hundred eighty thousand, eight hundred twenty".