2020656 has 80 divisors (see below), whose sum is σ = 5892480. Its totient is φ = 591360.

The previous prime is 2020621. The next prime is 2020657. The reversal of 2020656 is 6560202.

It is not an unprimeable number, because it can be changed into a prime (2020657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22660 + ... + 22748.

It is an arithmetic number, because the mean of its divisors is an integer number (73656).

2^2020656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2020656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2946240).

2020656 is an abundant number, since it is smaller than the sum of its proper divisors (3871824).

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

2020656 is a wasteful number, since it uses less digits than its factorization.

2020656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154 (or 148 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 2020656 is about 1421.4978016163. The cubic root of 2020656 is about 126.4243690664.

Adding to 2020656 its reverse (6560202), we get a palindrome (8580858).

The spelling of 2020656 in words is "two million, twenty thousand, six hundred fifty-six".