2185818 has 8 divisors (see below), whose sum is σ = 4371648. Its totient is φ = 728604.

The previous prime is 2185801. The next prime is 2185853. The reversal of 2185818 is 8185812.

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

2185818 is an admirable number.

It is an alternating number because its digits alternate between even and odd.

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, 182146 + ... + 182157.

It is an arithmetic number, because the mean of its divisors is an integer number (546456).

2^2185818 is an apocalyptic number.

2185818 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.

2185818 is a wasteful number, since it uses less digits than its factorization.

2185818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364308.

The product of its digits is 5120, while the sum is 33.

The square root of 2185818 is about 1478.4512166453. The cubic root of 2185818 is about 129.7790724909.

It can be divided in two parts, 2185 and 818, that added together give a palindrome (3003).

The spelling of 2185818 in words is "two million, one hundred eighty-five thousand, eight hundred eighteen".