2117836 has 24 divisors (see below), whose sum is σ = 4336640. Its totient is φ = 886032.

The previous prime is 2117833. The next prime is 2117849. The reversal of 2117836 is 6387112.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (2117833) 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 7 ways as a sum of consecutive naturals, for example, 325 + ... + 2083.

2^2117836 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2117836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2168320).

2117836 is an abundant number, since it is smaller than the sum of its proper divisors (2218804).

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

2117836 is a wasteful number, since it uses less digits than its factorization.

2117836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1813 (or 1811 counting only the distinct ones).

The product of its digits is 2016, while the sum is 28.

The square root of 2117836 is about 1455.2786674723. The cubic root of 2117836 is about 128.4194410963.

The spelling of 2117836 in words is "two million, one hundred seventeen thousand, eight hundred thirty-six".