2144820 has 24 divisors (see below), whose sum is σ = 6005664. Its totient is φ = 571936.

The previous prime is 2144801. The next prime is 2144837. The reversal of 2144820 is 284412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17814 + ... + 17933.

It is an arithmetic number, because the mean of its divisors is an integer number (250236).

2^2144820 is an apocalyptic number.

2144820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2144820 is an abundant number, since it is smaller than the sum of its proper divisors (3860844).

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

2144820 is a wasteful number, since it uses less digits than its factorization.

2144820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35759 (or 35757 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 2144820 is about 1464.5203993117. The cubic root of 2144820 is about 128.9625514758.

The spelling of 2144820 in words is "two million, one hundred forty-four thousand, eight hundred twenty".