2016820 has 24 divisors (see below), whose sum is σ = 4561704. Its totient is φ = 744576.

The previous prime is 2016787. The next prime is 2016821. The reversal of 2016820 is 286102.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 178084 + 1838736 = 422^2 + 1356^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2016821) 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 7 ways as a sum of consecutive naturals, for example, 3619 + ... + 4138.

It is an arithmetic number, because the mean of its divisors is an integer number (190071).

2^2016820 is an apocalyptic number.

2016820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2016820 is an abundant number, since it is smaller than the sum of its proper divisors (2544884).

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

2016820 is a wasteful number, since it uses less digits than its factorization.

2016820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7779 (or 7777 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 2016820 is about 1420.1478796238. The cubic root of 2016820 is about 126.3443173261.

It can be divided in two parts, 201 and 6820, that added together give a triangular number (7021 = T₁₁₈).

The spelling of 2016820 in words is "two million, sixteen thousand, eight hundred twenty".