3919821904 has 40 divisors (see below), whose sum is σ = 8010960480. Its totient is φ = 1852905600.

The previous prime is 3919821901. The next prime is 3919821929. The reversal of 3919821904 is 4091289193.

It is a happy number.

3919821904 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3919821901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136134 + ... + 162394.

It is an arithmetic number, because the mean of its divisors is an integer number (200274012).

Almost surely, 2^3919821904 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 3919821904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4005480240).

3919821904 is an abundant number, since it is smaller than the sum of its proper divisors (4091138576).

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

3919821904 is a wasteful number, since it uses less digits than its factorization.

3919821904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26779 (or 26773 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 46.

The square root of 3919821904 is about 62608.4810868304. The cubic root of 3919821904 is about 1576.7231536591.

The spelling of 3919821904 in words is "three billion, nine hundred nineteen million, eight hundred twenty-one thousand, nine hundred four".