3945008620 has 144 divisors (see below), whose sum is σ = 10057098240. Its totient is φ = 1294465536.

The previous prime is 3945008603. The next prime is 3945008621. The reversal of 3945008620 is 268005493.

3945008620 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 3945008620.

It is not an unprimeable number, because it can be changed into a prime (3945008621) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3608794 + ... + 3609886.

It is an arithmetic number, because the mean of its divisors is an integer number (69840960).

Almost surely, 2^3945008620 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 3945008620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5028549120).

3945008620 is an abundant number, since it is smaller than the sum of its proper divisors (6112089620).

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

3945008620 is a wasteful number, since it uses less digits than its factorization.

3945008620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1272 (or 1263 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 3945008620 is about 62809.3036102137. The cubic root of 3945008620 is about 1580.0930111351.

The spelling of 3945008620 in words is "three billion, nine hundred forty-five million, eight thousand, six hundred twenty".