2185812 has 48 divisors (see below), whose sum is σ = 5830720. Its totient is φ = 707616.

The previous prime is 2185801. The next prime is 2185853.

2185812 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (27).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3723 + ... + 4269.

2^2185812 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 2185812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2915360).

2185812 is an abundant number, since it is smaller than the sum of its proper divisors (3644908).

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

2185812 is a wasteful number, since it uses less digits than its factorization.

2185812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 597 (or 589 counting only the distinct ones).

The product of its digits is 1280, while the sum is 27.

The square root of 2185812 is about 1478.4491874934. The cubic root of 2185812 is about 129.7789537443.

The spelling of 2185812 in words is "two million, one hundred eighty-five thousand, eight hundred twelve".