2164406 has 8 divisors (see below), whose sum is σ = 3437640. Its totient is φ = 1018528.

The previous prime is 2164399. The next prime is 2164417. The reversal of 2164406 is 6044612.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

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, 31796 + ... + 31863.

It is an arithmetic number, because the mean of its divisors is an integer number (429705).

2^2164406 is an apocalyptic number.

2164406 is a deficient number, since it is larger than the sum of its proper divisors (1273234).

2164406 is a wasteful number, since it uses less digits than its factorization.

2164406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63678.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 2164406 is about 1471.1920336924. The cubic root of 2164406 is about 129.3539146637.

The spelling of 2164406 in words is "two million, one hundred sixty-four thousand, four hundred six".