3609728 has 16 divisors (see below), whose sum is σ = 7191510. Its totient is φ = 1804800.

The previous prime is 3609719. The next prime is 3609731. The reversal of 3609728 is 8279063.

It can be written as a sum of positive squares in only one way, i.e., 2849344 + 760384 = 1688^2 + 872^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13973 + ... + 14228.

Almost surely, 2^3609728 is an apocalyptic number.

It is an amenable number.

3609728 is a deficient number, since it is larger than the sum of its proper divisors (3581782).

3609728 is an equidigital number, since it uses as much as digits as its factorization.

3609728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28215 (or 28203 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 3609728 is about 1899.9284197043. The cubic root of 3609728 is about 153.3998115436.

The spelling of 3609728 in words is "three million, six hundred nine thousand, seven hundred twenty-eight".