2039805 has 12 divisors (see below), whose sum is σ = 3535740. Its totient is φ = 1087872.

The previous prime is 2039797. The next prime is 2039819. The reversal of 2039805 is 5089302.

It can be written as a sum of positive squares in 2 ways, for example, as 962361 + 1077444 = 981^2 + 1038^2 .

It is not a de Polignac number, because 2039805 - 2³ = 2039797 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22620 + ... + 22709.

It is an arithmetic number, because the mean of its divisors is an integer number (294645).

2^2039805 is an apocalyptic number.

It is an amenable number.

2039805 is a deficient number, since it is larger than the sum of its proper divisors (1495935).

2039805 is a wasteful number, since it uses less digits than its factorization.

2039805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45340 (or 45337 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 2039805 is about 1428.2174204231. The cubic root of 2039805 is about 126.8224729380.

The spelling of 2039805 in words is "two million, thirty-nine thousand, eight hundred five".