3630728 has 16 divisors (see below), whose sum is σ = 6901980. Its totient is φ = 1790208.

The previous prime is 3630709. The next prime is 3630733. The reversal of 3630728 is 8270363.

3630728 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 3541924 + 88804 = 1882^2 + 298^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 3630728.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2525 + ... + 3692.

Almost surely, 2^3630728 is an apocalyptic number.

It is an amenable number.

3630728 is a deficient number, since it is larger than the sum of its proper divisors (3271252).

3630728 is a wasteful number, since it uses less digits than its factorization.

3630728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6296 (or 6292 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 3630728 is about 1905.4469292006. The cubic root of 3630728 is about 153.6967101105.

The spelling of 3630728 in words is "three million, six hundred thirty thousand, seven hundred twenty-eight".