3878901648 has 80 divisors (see below), whose sum is σ = 11191813440. Its totient is φ = 1286240256.

The previous prime is 3878901563. The next prime is 3878901671. The reversal of 3878901648 is 8461098783.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 3878901594 and 3878901603.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60115 + ... + 106637.

It is an arithmetic number, because the mean of its divisors is an integer number (139897668).

Almost surely, 2^3878901648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3878901648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5595906720).

3878901648 is an abundant number, since it is smaller than the sum of its proper divisors (7312911792).

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

3878901648 is a wasteful number, since it uses less digits than its factorization.

3878901648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46733 (or 46721 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 54.

The square root of 3878901648 is about 62280.8288962181. The cubic root of 3878901648 is about 1571.2173133021.

The spelling of 3878901648 in words is "three billion, eight hundred seventy-eight million, nine hundred one thousand, six hundred forty-eight".