201605728 has 12 divisors (see below), whose sum is σ = 396911340. Its totient is φ = 100802848.

The previous prime is 201605689. The next prime is 201605749. The reversal of 201605728 is 827506102.

It is a self number, because there is not a number n which added to its sum of digits gives 201605728.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3150058 + ... + 3150121.

It is an arithmetic number, because the mean of its divisors is an integer number (33075945).

Almost surely, 2^201605728 is an apocalyptic number.

It is an amenable number.

201605728 is a deficient number, since it is larger than the sum of its proper divisors (195305612).

201605728 is an equidigital number, since it uses as much as digits as its factorization.

201605728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6300189 (or 6300181 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 201605728 is about 14198.7931881551. The cubic root of 201605728 is about 586.3644368447.

The spelling of 201605728 in words is "two hundred one million, six hundred five thousand, seven hundred twenty-eight".