2160820 has 12 divisors (see below), whose sum is σ = 4537764. Its totient is φ = 864320.

The previous prime is 2160797. The next prime is 2160833. The reversal of 2160820 is 280612.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 933156 + 1227664 = 966^2 + 1108^2 .

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, 54001 + ... + 54040.

It is an arithmetic number, because the mean of its divisors is an integer number (378147).

2^2160820 is an apocalyptic number.

2160820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2160820 is an abundant number, since it is smaller than the sum of its proper divisors (2376944).

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

2160820 is a wasteful number, since it uses less digits than its factorization.

2160820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108050 (or 108048 counting only the distinct ones).

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

The square root of 2160820 is about 1469.9727888638. The cubic root of 2160820 is about 129.2824370773.

The spelling of 2160820 in words is "two million, one hundred sixty thousand, eight hundred twenty".