3855421788 has 48 divisors (see below), whose sum is σ = 9158607360. Its totient is φ = 1261957504.

The previous prime is 3855421783. The next prime is 3855421903. The reversal of 3855421788 is 8871245583.

3855421788 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 3855421788.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3855421783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 778456 + ... + 783392.

It is an arithmetic number, because the mean of its divisors is an integer number (190804320).

Almost surely, 2^3855421788 is an apocalyptic number.

It is an amenable number.

3855421788 is an abundant number, since it is smaller than the sum of its proper divisors (5303185572).

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

3855421788 is a wasteful number, since it uses less digits than its factorization.

3855421788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6106 (or 6104 counting only the distinct ones).

The product of its digits is 2150400, while the sum is 51.

The square root of 3855421788 is about 62092.0428718528. The cubic root of 3855421788 is about 1568.0405847948.

The spelling of 3855421788 in words is "three billion, eight hundred fifty-five million, four hundred twenty-one thousand, seven hundred eighty-eight".