3878193845 has 4 divisors (see below), whose sum is σ = 4653832620. Its totient is φ = 3102555072.

The previous prime is 3878193821. The next prime is 3878193877. The reversal of 3878193845 is 5483918783.

3878193845 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1580142001 + 2298051844 = 39751^2 + 47938^2 .

It is a cyclic number.

It is not a de Polignac number, because 3878193845 - 2¹⁴ = 3878177461 is a prime.

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, 387819380 + ... + 387819389.

It is an arithmetic number, because the mean of its divisors is an integer number (1163458155).

Almost surely, 2^3878193845 is an apocalyptic number.

It is an amenable number.

3878193845 is a deficient number, since it is larger than the sum of its proper divisors (775638775).

3878193845 is an equidigital number, since it uses as much as digits as its factorization.

3878193845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 775638774.

The product of its digits is 5806080, while the sum is 56.

The square root of 3878193845 is about 62275.1462864601. The cubic root of 3878193845 is about 1571.1217381384.

The spelling of 3878193845 in words is "three billion, eight hundred seventy-eight million, one hundred ninety-three thousand, eight hundred forty-five".