2166838 has 8 divisors (see below), whose sum is σ = 3355200. Its totient is φ = 1048440.

The previous prime is 2166833. The next prime is 2166877. The reversal of 2166838 is 8386612.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2166833) 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, 17413 + ... + 17536.

It is an arithmetic number, because the mean of its divisors is an integer number (419400).

2^2166838 is an apocalyptic number.

2166838 is a deficient number, since it is larger than the sum of its proper divisors (1188362).

2166838 is a wasteful number, since it uses less digits than its factorization.

2166838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34982.

The product of its digits is 13824, while the sum is 34.

The square root of 2166838 is about 1472.0183422770. The cubic root of 2166838 is about 129.4023453442.

The spelling of 2166838 in words is "two million, one hundred sixty-six thousand, eight hundred thirty-eight".