2209820 has 12 divisors (see below), whose sum is σ = 4640664. Its totient is φ = 883920.

The previous prime is 2209811. The next prime is 2209841. The reversal of 2209820 is 289022.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

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, 55226 + ... + 55265.

It is an arithmetic number, because the mean of its divisors is an integer number (386722).

2^2209820 is an apocalyptic number.

2209820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2209820 is an abundant number, since it is smaller than the sum of its proper divisors (2430844).

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

2209820 is a wasteful number, since it uses less digits than its factorization.

2209820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110500 (or 110498 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 2209820 is about 1486.5463329476. The cubic root of 2209820 is about 130.2523697168.

The spelling of 2209820 in words is "two million, two hundred nine thousand, eight hundred twenty".