2005812 has 18 divisors (see below), whose sum is σ = 5070338. Its totient is φ = 668592.

The previous prime is 2005799. The next prime is 2005831. The reversal of 2005812 is 2185002.

It can be written as a sum of positive squares in only one way, i.e., 1971216 + 34596 = 1404^2 + 186^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27823 + ... + 27894.

2^2005812 is an apocalyptic number.

It is an amenable number.

2005812 is an abundant number, since it is smaller than the sum of its proper divisors (3064526).

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

2005812 is a wasteful number, since it uses less digits than its factorization.

2005812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55727 (or 55722 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 2005812 is about 1416.2669239942. The cubic root of 2005812 is about 126.1140313120.

The spelling of 2005812 in words is "two million, five thousand, eight hundred twelve".