3878813386 has 16 divisors (see below), whose sum is σ = 6679217664. Its totient is φ = 1654892784.

The previous prime is 3878813371. The next prime is 3878813401. The reversal of 3878813386 is 6833188783.

It is an interprime number because it is at equal distance from previous prime (3878813371) and next prime (3878813401).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 618085 + ... + 624328.

It is an arithmetic number, because the mean of its divisors is an integer number (417451104).

Almost surely, 2^3878813386 is an apocalyptic number.

3878813386 is a deficient number, since it is larger than the sum of its proper divisors (2800404278).

3878813386 is a wasteful number, since it uses less digits than its factorization.

3878813386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1242645.

The product of its digits is 4644864, while the sum is 55.

The square root of 3878813386 is about 62280.1203113803. The cubic root of 3878813386 is about 1571.2053958533.

The spelling of 3878813386 in words is "three billion, eight hundred seventy-eight million, eight hundred thirteen thousand, three hundred eighty-six".