1605696804 has 48 divisors (see below), whose sum is σ = 4215635200. Its totient is φ = 528454368.

The previous prime is 1605696803. The next prime is 1605696811. The reversal of 1605696804 is 4086965061.

1605696804 is a `hidden beast` number, since 1 + 6 + 0 + 569 + 6 + 80 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1605696804.

It is not an unprimeable number, because it can be changed into a prime (1605696803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85567 + ... + 102630.

Almost surely, 2^1605696804 is an apocalyptic number.

It is an amenable number.

1605696804 is an abundant number, since it is smaller than the sum of its proper divisors (2609938396).

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

1605696804 is a wasteful number, since it uses less digits than its factorization.

1605696804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188289 (or 188281 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 1605696804 is about 40071.1467767021. The cubic root of 1605696804 is about 1170.9935807188.

The spelling of 1605696804 in words is "one billion, six hundred five million, six hundred ninety-six thousand, eight hundred four".