2680209 has 40 divisors (see below), whose sum is σ = 4762560. Its totient is φ = 1469664.

The previous prime is 2680141. The next prime is 2680231. The reversal of 2680209 is 9020862.

It is not a de Polignac number, because 2680209 - 2⁸ = 2679953 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2680009) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 16362 + ... + 16524.

It is an arithmetic number, because the mean of its divisors is an integer number (119064).

2^2680209 is an apocalyptic number.

2680209 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

2680209 is a deficient number, since it is larger than the sum of its proper divisors (2082351).

2680209 is a wasteful number, since it uses less digits than its factorization.

2680209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211 (or 202 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 2680209 is about 1637.1343866647. The cubic root of 2680209 is about 138.9066018535.

The spelling of 2680209 in words is "two million, six hundred eighty thousand, two hundred nine".