3805947 has 20 divisors (see below), whose sum is σ = 5987080. Its totient is φ = 2402784.

The previous prime is 3805933. The next prime is 3805951. The reversal of 3805947 is 7495083.

It is not a de Polignac number, because 3805947 - 2⁷ = 3805819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3805927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 303 + ... + 2775.

It is an arithmetic number, because the mean of its divisors is an integer number (299354).

Almost surely, 2^3805947 is an apocalyptic number.

3805947 is a deficient number, since it is larger than the sum of its proper divisors (2181133).

3805947 is a wasteful number, since it uses less digits than its factorization.

3805947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2504 (or 2495 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 3805947 is about 1950.8836459410. The cubic root of 3805947 is about 156.1304382419.

The spelling of 3805947 in words is "three million, eight hundred five thousand, nine hundred forty-seven".