3878813385 has 24 divisors (see below), whose sum is σ = 6972288960. Its totient is φ = 2068699824.

The previous prime is 3878813371. The next prime is 3878813401. The reversal of 3878813385 is 5833188783.

It is not a de Polignac number, because 3878813385 - 2⁴ = 3878813369 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1595005 + ... + 1597434.

It is an arithmetic number, because the mean of its divisors is an integer number (290512040).

Almost surely, 2^3878813385 is an apocalyptic number.

It is an amenable number.

3878813385 is a deficient number, since it is larger than the sum of its proper divisors (3093475575).

3878813385 is an equidigital number, since it uses as much as digits as its factorization.

3878813385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3192459 (or 3192447 counting only the distinct ones).

The product of its digits is 3870720, while the sum is 54.

The square root of 3878813385 is about 62280.1203033520. The cubic root of 3878813385 is about 1571.2053957183.

The spelling of 3878813385 in words is "three billion, eight hundred seventy-eight million, eight hundred thirteen thousand, three hundred eighty-five".