2163404 has 6 divisors (see below), whose sum is σ = 3785964. Its totient is φ = 1081700.

The previous prime is 2163401. The next prime is 2163409. The reversal of 2163404 is 4043612.

It is a happy number.

It is a d-powerful number, because it can be written as 2²¹ + 1 + 6³ + 3⁵ + 4⁴ + 0 + 4⁸ .

It is not an unprimeable number, because it can be changed into a prime (2163401) 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 as a sum of consecutive naturals, namely, 270422 + ... + 270429.

It is an arithmetic number, because the mean of its divisors is an integer number (630994).

2^2163404 is an apocalyptic number.

It is an amenable number.

2163404 is a deficient number, since it is larger than the sum of its proper divisors (1622560).

2163404 is a wasteful number, since it uses less digits than its factorization.

2163404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540855 (or 540853 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 2163404 is about 1470.8514540905. The cubic root of 2163404 is about 129.3339503519. Note that the first 3 decimals are identical.

The spelling of 2163404 in words is "two million, one hundred sixty-three thousand, four hundred four".