3847645 has 12 divisors (see below), whose sum is σ = 4764564. Its totient is φ = 2981120.

The previous prime is 3847639. The next prime is 3847651. The reversal of 3847645 is 5467483.

It is an interprime number because it is at equal distance from previous prime (3847639) and next prime (3847651).

It can be written as a sum of positive squares in 6 ways, for example, as 264196 + 3583449 = 514^2 + 1893^2 .

It is not a de Polignac number, because 3847645 - 2³ = 3847637 is a prime.

It is a Duffinian number.

Its product of digits (80640) is a multiple of the sum of its prime factors (320).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28017 + ... + 28153.

It is an arithmetic number, because the mean of its divisors is an integer number (397047).

Almost surely, 2^3847645 is an apocalyptic number.

It is an amenable number.

3847645 is a deficient number, since it is larger than the sum of its proper divisors (916919).

3847645 is an equidigital number, since it uses as much as digits as its factorization.

3847645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320 (or 183 counting only the distinct ones).

The product of its digits is 80640, while the sum is 37.

The square root of 3847645 is about 1961.5414856689. The cubic root of 3847645 is about 156.6985574635.

The spelling of 3847645 in words is "three million, eight hundred forty-seven thousand, six hundred forty-five".