3969091728 has 480 divisors, whose sum is σ = 14275872000. Its totient is φ = 1024192512.

The previous prime is 3969091703. The next prime is 3969091729. The reversal of 3969091728 is 8271909693.

It is not an unprimeable number, because it can be changed into a prime (3969091729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 24350175 + ... + 24350337.

It is an arithmetic number, because the mean of its divisors is an integer number (29741400).

Almost surely, 2^3969091728 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 3969091728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7137936000).

3969091728 is an abundant number, since it is smaller than the sum of its proper divisors (10306780272).

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

3969091728 is a wasteful number, since it uses less digits than its factorization.

3969091728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244 (or 221 counting only the distinct ones).

The product of its (nonzero) digits is 1469664, while the sum is 54.

The square root of 3969091728 is about 63000.7279957938. The cubic root of 3969091728 is about 1583.3018234714.

The spelling of 3969091728 in words is "three billion, nine hundred sixty-nine million, ninety-one thousand, seven hundred twenty-eight".