2163812 has 12 divisors (see below), whose sum is σ = 4327680. Its totient is φ = 927336.

The previous prime is 2163809. The next prime is 2163823. The reversal of 2163812 is 2183612.

2163812 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, 38612 + ... + 38667.

It is an arithmetic number, because the mean of its divisors is an integer number (360640).

2^2163812 is an apocalyptic number.

It is an amenable number.

2163812 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.

2163812 is a wasteful number, since it uses less digits than its factorization.

2163812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77290 (or 77288 counting only the distinct ones).

The product of its digits is 576, while the sum is 23.

The square root of 2163812 is about 1470.9901427270. The cubic root of 2163812 is about 129.3420802766.

The spelling of 2163812 in words is "two million, one hundred sixty-three thousand, eight hundred twelve".