3878946917 has 8 divisors (see below), whose sum is σ = 3951163680. Its totient is φ = 3806946000.

The previous prime is 3878946893. The next prime is 3878946923. The reversal of 3878946917 is 7196498783.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3878946917 - 2⁶ = 3878946853 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3878946917.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3878946217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17459 + ... + 89792.

It is an arithmetic number, because the mean of its divisors is an integer number (493895460).

Almost surely, 2^3878946917 is an apocalyptic number.

It is an amenable number.

3878946917 is a deficient number, since it is larger than the sum of its proper divisors (72216763).

3878946917 is a wasteful number, since it uses less digits than its factorization.

3878946917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107923.

The product of its digits is 18289152, while the sum is 62.

The square root of 3878946917 is about 62281.1923215990. The cubic root of 3878946917 is about 1571.2234256131.

The spelling of 3878946917 in words is "three billion, eight hundred seventy-eight million, nine hundred forty-six thousand, nine hundred seventeen".