1604322916 has 27 divisors (see below), whose sum is σ = 3267085017. Its totient is φ = 687326640.

The previous prime is 1604322913. The next prime is 1604322917. The reversal of 1604322916 is 6192234061.

It is a happy number.

The square root of 1604322916 is 40054.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 896762916 + 707560000 = 29946^2 + 26600^2 .

It is not an unprimeable number, because it can be changed into a prime (1604322913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 559326 + ... + 562186.

Almost surely, 2^1604322916 is an apocalyptic number.

1604322916 is the 40054-th square number.

It is an amenable number.

1604322916 is an abundant number, since it is smaller than the sum of its proper divisors (1662762101).

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

1604322916 is an frugal number, since it uses more digits than its factorization.

1604322916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5740 (or 2870 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 34.

The cubic root of 1604322916 is about 1170.6595049675.

Adding to 1604322916 its reverse (6192234061), we get a palindrome (7796556977).

The spelling of 1604322916 in words is "one billion, six hundred four million, three hundred twenty-two thousand, nine hundred sixteen".