3209286728 has 12 divisors (see below), whose sum is σ = 6017713065. Its totient is φ = 1604563248.

The previous prime is 3209286701. The next prime is 3209286733. The reversal of 3209286728 is 8276829023.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

3209286728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 3013790404 + 195496324 = 54898^2 + 13982^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=40058.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 150218 + ... + 170246.

Almost surely, 2^3209286728 is an apocalyptic number.

It is an amenable number.

3209286728 is a deficient number, since it is larger than the sum of its proper divisors (2808426337).

3209286728 is an frugal number, since it uses more digits than its factorization.

3209286728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40064 (or 20031 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 47.

The square root of 3209286728 is about 56650.5668815414. The cubic root of 3209286728 is about 1475.0367476050.

The spelling of 3209286728 in words is "three billion, two hundred nine million, two hundred eighty-six thousand, seven hundred twenty-eight".