2117798 has 8 divisors (see below), whose sum is σ = 3228960. Its totient is φ = 1041480.

The previous prime is 2117777. The next prime is 2117813. The reversal of 2117798 is 8977112.

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

It is a congruent number.

It is an unprimeable number.

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, 8558 + ... + 8801.

It is an arithmetic number, because the mean of its divisors is an integer number (403620).

2^2117798 is an apocalyptic number.

2117798 is a deficient number, since it is larger than the sum of its proper divisors (1111162).

2117798 is a wasteful number, since it uses less digits than its factorization.

2117798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17422.

The product of its digits is 7056, while the sum is 35.

The square root of 2117798 is about 1455.2656114950. The cubic root of 2117798 is about 128.4186730218.

The spelling of 2117798 in words is "two million, one hundred seventeen thousand, seven hundred ninety-eight".