3878847 has 20 divisors (see below), whose sum is σ = 6623056. Its totient is φ = 2216160.

The previous prime is 3878843. The next prime is 3878867. The reversal of 3878847 is 7488783.

It is not a de Polignac number, because 3878847 - 2² = 3878843 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3878843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2854 + ... + 3987.

Almost surely, 2^3878847 is an apocalyptic number.

3878847 is a deficient number, since it is larger than the sum of its proper divisors (2744209).

3878847 is an equidigital number, since it uses as much as digits as its factorization.

3878847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6860 (or 6851 counting only the distinct ones).

The product of its digits is 301056, while the sum is 45.

The square root of 3878847 is about 1969.4788650808. The cubic root of 3878847 is about 157.1209934556.

The spelling of 3878847 in words is "three million, eight hundred seventy-eight thousand, eight hundred forty-seven".