3861278812 has 12 divisors (see below), whose sum is σ = 6922048896. Its totient is φ = 1883550560.

The previous prime is 3861278803. The next prime is 3861278879. The reversal of 3861278812 is 2188721683.

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, 11772028 + ... + 11772355.

It is an arithmetic number, because the mean of its divisors is an integer number (576837408).

Almost surely, 2^3861278812 is an apocalyptic number.

It is an amenable number.

3861278812 is a deficient number, since it is larger than the sum of its proper divisors (3060770084).

3861278812 is a wasteful number, since it uses less digits than its factorization.

3861278812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23544428 (or 23544426 counting only the distinct ones).

The product of its digits is 258048, while the sum is 46.

The square root of 3861278812 is about 62139.1890194908. The cubic root of 3861278812 is about 1568.8342207933.

The spelling of 3861278812 in words is "three billion, eight hundred sixty-one million, two hundred seventy-eight thousand, eight hundred twelve".