3878348643 has 24 divisors (see below), whose sum is σ = 6089389488. Its totient is φ = 2364363072.

The previous prime is 3878348641. The next prime is 3878348687. The reversal of 3878348643 is 3468438783.

3878348643 is a `hidden beast` number, since 3 + 87 + 83 + 486 + 4 + 3 = 666.

It is not a de Polignac number, because 3878348643 - 2¹ = 3878348641 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3878348643.

It is not an unprimeable number, because it can be changed into a prime (3878348641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 142380 + ... + 167417.

It is an arithmetic number, because the mean of its divisors is an integer number (253724562).

Almost surely, 2^3878348643 is an apocalyptic number.

3878348643 is a deficient number, since it is larger than the sum of its proper divisors (2211040845).

3878348643 is a wasteful number, since it uses less digits than its factorization.

3878348643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309923 (or 309920 counting only the distinct ones).

The product of its digits is 9289728, while the sum is 54.

The square root of 3878348643 is about 62276.3891294285. The cubic root of 3878348643 is about 1571.1426416205.

The spelling of 3878348643 in words is "three billion, eight hundred seventy-eight million, three hundred forty-eight thousand, six hundred forty-three".