2206820 has 48 divisors (see below), whose sum is σ = 5781888. Its totient is φ = 687360.

The previous prime is 2206819. The next prime is 2206823. The reversal of 2206820 is 286022.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 2206792 and 2206801.

It is not an unprimeable number, because it can be changed into a prime (2206823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 824 + ... + 2256.

It is an arithmetic number, because the mean of its divisors is an integer number (120456).

2^2206820 is an apocalyptic number.

2206820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2206820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2890944).

2206820 is an abundant number, since it is smaller than the sum of its proper divisors (3575068).

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

2206820 is a wasteful number, since it uses less digits than its factorization.

2206820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1460 (or 1458 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 2206820 is about 1485.5369399648. The cubic root of 2206820 is about 130.1934004991.

The spelling of 2206820 in words is "two million, two hundred six thousand, eight hundred twenty".