3909673728 has 108 divisors (see below), whose sum is σ = 11290814808. Its totient is φ = 1301114880.

The previous prime is 3909673723. The next prime is 3909673751. The reversal of 3909673728 is 8273769093.

It is not an unprimeable number, because it can be changed into a prime (3909673723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2157943 + ... + 2159753.

Almost surely, 2^3909673728 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 3909673728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5645407404).

3909673728 is an abundant number, since it is smaller than the sum of its proper divisors (7381141080).

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

3909673728 is a wasteful number, since it uses less digits than its factorization.

3909673728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2770 (or 2753 counting only the distinct ones).

The product of its (nonzero) digits is 3429216, while the sum is 54.

The square root of 3909673728 is about 62527.3838250090. The cubic root of 3909673728 is about 1575.3612982170.

The spelling of 3909673728 in words is "three billion, nine hundred nine million, six hundred seventy-three thousand, seven hundred twenty-eight".