2163804 has 12 divisors (see below), whose sum is σ = 5048904. Its totient is φ = 721264.

The previous prime is 2163787. The next prime is 2163809. The reversal of 2163804 is 4083612.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2163809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90147 + ... + 90170.

It is an arithmetic number, because the mean of its divisors is an integer number (420742).

2^2163804 is an apocalyptic number.

It is an amenable number.

2163804 is an abundant number, since it is smaller than the sum of its proper divisors (2885100).

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

2163804 is a wasteful number, since it uses less digits than its factorization.

2163804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180324 (or 180322 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 2163804 is about 1470.9874234677. The cubic root of 2163804 is about 129.3419208762.

The spelling of 2163804 in words is "two million, one hundred sixty-three thousand, eight hundred four".