3877865 has 4 divisors (see below), whose sum is σ = 4653444. Its totient is φ = 3102288.

The previous prime is 3877849. The next prime is 3877871. The reversal of 3877865 is 5687783.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5687783 = 19 ⋅299357.

It can be written as a sum of positive squares in 2 ways, for example, as 737881 + 3139984 = 859^2 + 1772^2 .

It is a cyclic number.

It is not a de Polignac number, because 3877865 - 2⁴ = 3877849 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 387782 + ... + 387791.

It is an arithmetic number, because the mean of its divisors is an integer number (1163361).

Almost surely, 2^3877865 is an apocalyptic number.

It is an amenable number.

3877865 is a deficient number, since it is larger than the sum of its proper divisors (775579).

3877865 is an equidigital number, since it uses as much as digits as its factorization.

3877865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 775578.

The product of its digits is 282240, while the sum is 44.

The square root of 3877865 is about 1969.2295447713. The cubic root of 3877865 is about 157.1077329998.

The spelling of 3877865 in words is "three million, eight hundred seventy-seven thousand, eight hundred sixty-five".