1601728 has 28 divisors (see below), whose sum is σ = 3291840. Its totient is φ = 772352.

The previous prime is 1601711. The next prime is 1601729. The reversal of 1601728 is 8271061.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1601729) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 1425 + ... + 2287.

2^1601728 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 1601728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1645920).

1601728 is an abundant number, since it is smaller than the sum of its proper divisors (1690112).

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

1601728 is an equidigital number, since it uses as much as digits as its factorization.

1601728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 904 (or 894 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 1601728 is about 1265.5939317174. The cubic root of 1601728 is about 117.0028002349.

Adding to 1601728 its reverse (8271061), we get a palindrome (9872789).

The spelling of 1601728 in words is "one million, six hundred one thousand, seven hundred twenty-eight".