2117838 has 8 divisors (see below), whose sum is σ = 4235688. Its totient is φ = 705944.

The previous prime is 2117833. The next prime is 2117849. The reversal of 2117838 is 8387112.

It is a happy number.

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

2117838 is an admirable number.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2117833) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 176481 + ... + 176492.

It is an arithmetic number, because the mean of its divisors is an integer number (529461).

2^2117838 is an apocalyptic number.

2117838 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2117838 is a wasteful number, since it uses less digits than its factorization.

2117838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352978.

The product of its digits is 2688, while the sum is 30.

The square root of 2117838 is about 1455.2793546258. The cubic root of 2117838 is about 128.4194815211.

The spelling of 2117838 in words is "two million, one hundred seventeen thousand, eight hundred thirty-eight".