3965889880 has 64 divisors (see below), whose sum is σ = 9483454080. Its totient is φ = 1487462400.

The previous prime is 3965889877. The next prime is 3965889901. The reversal of 3965889880 is 889885693.

3965889880 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 an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 173520 + ... + 195040.

It is an arithmetic number, because the mean of its divisors is an integer number (148178970).

Almost surely, 2^3965889880 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 3965889880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4741727040).

3965889880 is an abundant number, since it is smaller than the sum of its proper divisors (5517564200).

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

3965889880 is a wasteful number, since it uses less digits than its factorization.

3965889880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21820 (or 21816 counting only the distinct ones).

The product of its (nonzero) digits is 29859840, while the sum is 64.

The square root of 3965889880 is about 62975.3116705269. The cubic root of 3965889880 is about 1582.8759615099.

The spelling of 3965889880 in words is "three billion, nine hundred sixty-five million, eight hundred eighty-nine thousand, eight hundred eighty".