1605939328 has 48 divisors (see below), whose sum is σ = 3721686750. Its totient is φ = 688257024.

The previous prime is 1605939317. The next prime is 1605939329. The reversal of 1605939328 is 8239395061.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 904325184 + 701614144 = 30072^2 + 26488^2 .

It is a super-2 number, since 2×1605939328² = 5158082250434183168, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1605939329) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 121753 + ... + 134296.

Almost surely, 2^1605939328 is an apocalyptic number.

It is an amenable number.

1605939328 is an abundant number, since it is smaller than the sum of its proper divisors (2115747422).

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

1605939328 is an equidigital number, since it uses as much as digits as its factorization.

1605939328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256077 (or 256058 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 46.

The square root of 1605939328 is about 40074.1728298913. The cubic root of 1605939328 is about 1171.0525332661.

The spelling of 1605939328 in words is "one billion, six hundred five million, nine hundred thirty-nine thousand, three hundred twenty-eight".