3878885 has 4 divisors (see below), whose sum is σ = 4654668. Its totient is φ = 3103104.

The previous prime is 3878879. The next prime is 3878893. The reversal of 3878885 is 5888783.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5888783 = 17 ⋅346399.

It can be written as a sum of positive squares in 2 ways, for example, as 2896804 + 982081 = 1702^2 + 991^2 .

It is a cyclic number.

It is not a de Polignac number, because 3878885 - 2⁸ = 3878629 is a prime.

It is a Duffinian number.

It is a congruent 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, 387884 + ... + 387893.

It is an arithmetic number, because the mean of its divisors is an integer number (1163667).

Almost surely, 2^3878885 is an apocalyptic number.

It is an amenable number.

3878885 is a deficient number, since it is larger than the sum of its proper divisors (775783).

3878885 is an equidigital number, since it uses as much as digits as its factorization.

3878885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 775782.

The product of its digits is 430080, while the sum is 47.

The square root of 3878885 is about 1969.4885122793. The cubic root of 3878885 is about 157.1215065444.

The spelling of 3878885 in words is "three million, eight hundred seventy-eight thousand, eight hundred eighty-five".