3878569926 has 128 divisors (see below), whose sum is σ = 10768665600. Its totient is φ = 1005281280.

The previous prime is 3878569889. The next prime is 3878569927. The reversal of 3878569926 is 6299658783.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3878569927) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3196896 + ... + 3198108.

It is an arithmetic number, because the mean of its divisors is an integer number (84130200).

Almost surely, 2^3878569926 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3878569926, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5384332800).

3878569926 is an abundant number, since it is smaller than the sum of its proper divisors (6890095674).

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

3878569926 is a wasteful number, since it uses less digits than its factorization.

3878569926 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2011 (or 2005 counting only the distinct ones).

The product of its digits is 39191040, while the sum is 63.

The square root of 3878569926 is about 62278.1657244335. The cubic root of 3878569926 is about 1571.1725220823.

The spelling of 3878569926 in words is "three billion, eight hundred seventy-eight million, five hundred sixty-nine thousand, nine hundred twenty-six".