3878261568 has 42 divisors (see below), whose sum is σ = 11116338194. Its totient is φ = 1292753664.

The previous prime is 3878261539. The next prime is 3878261617. The reversal of 3878261568 is 8651628783.

3878261568 is a `hidden beast` number, since 3 + 8 + 78 + 2 + 6 + 1 + 568 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3409625664 + 468635904 = 58392^2 + 21648^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3365971 + ... + 3367122.

Almost surely, 2^3878261568 is an apocalyptic number.

It is an amenable number.

3878261568 is an abundant number, since it is smaller than the sum of its proper divisors (7238076626).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3878261568 is a wasteful number, since it uses less digits than its factorization.

3878261568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6733111 (or 6733098 counting only the distinct ones).

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

The square root of 3878261568 is about 62275.6900242783. The cubic root of 3878261568 is about 1571.1308833284.

The spelling of 3878261568 in words is "three billion, eight hundred seventy-eight million, two hundred sixty-one thousand, five hundred sixty-eight".