3921608824 has 64 divisors (see below), whose sum is σ = 8916350400. Its totient is φ = 1578522624.

The previous prime is 3921608783. The next prime is 3921608827. The reversal of 3921608824 is 4288061293.

3921608824 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 (3921608827) 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, 480522 + ... + 488614.

It is an arithmetic number, because the mean of its divisors is an integer number (139317975).

Almost surely, 2^3921608824 is an apocalyptic number.

3921608824 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3921608824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4458175200).

3921608824 is an abundant number, since it is smaller than the sum of its proper divisors (4994741576).

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

3921608824 is a wasteful number, since it uses less digits than its factorization.

With its successor (3921608825) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (8628).

With its successor (3921608825) it forms an eRAP, since the sums of their prime factors are consecutive (8632 and 8633).

3921608824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8632 (or 8628 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 43.

The square root of 3921608824 is about 62622.7500513991. The cubic root of 3921608824 is about 1576.9627096205.

The spelling of 3921608824 in words is "three billion, nine hundred twenty-one million, six hundred eight thousand, eight hundred twenty-four".