3878126440 has 16 divisors (see below), whose sum is σ = 8725784580. Its totient is φ = 1551250560.

The previous prime is 3878126407. The next prime is 3878126459. The reversal of 3878126440 is 446218783.

3878126440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 3312923364 + 565203076 = 57558^2 + 23774^2 .

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, 48476541 + ... + 48476620.

Almost surely, 2^3878126440 is an apocalyptic number.

It is an amenable number.

3878126440 is an abundant number, since it is smaller than the sum of its proper divisors (4847658140).

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

3878126440 is a wasteful number, since it uses less digits than its factorization.

3878126440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96953172 (or 96953168 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 43.

The square root of 3878126440 is about 62274.6050971020. The cubic root of 3878126440 is about 1571.1126357849.

The spelling of 3878126440 in words is "three billion, eight hundred seventy-eight million, one hundred twenty-six thousand, four hundred forty".