3806945 has 4 divisors (see below), whose sum is σ = 4568340. Its totient is φ = 3045552.

The previous prime is 3806927. The next prime is 3806981. The reversal of 3806945 is 5496083.

3806945 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2798929 + 1008016 = 1673^2 + 1004^2 .

It is a cyclic number.

It is not a de Polignac number, because 3806945 - 2⁸ = 3806689 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 380690 + ... + 380699.

It is an arithmetic number, because the mean of its divisors is an integer number (1142085).

Almost surely, 2^3806945 is an apocalyptic number.

It is an amenable number.

3806945 is a deficient number, since it is larger than the sum of its proper divisors (761395).

3806945 is an equidigital number, since it uses as much as digits as its factorization.

3806945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 761394.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 3806945 is about 1951.1394107034. The cubic root of 3806945 is about 156.1440839530.

The spelling of 3806945 in words is "three million, eight hundred six thousand, nine hundred forty-five".