1605053904 has 40 divisors (see below), whose sum is σ = 4148633280. Its totient is φ = 534728448.

The previous prime is 1605053893. The next prime is 1605053909. The reversal of 1605053904 is 4093505061.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1605053909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92269 + ... + 108275.

It is an arithmetic number, because the mean of its divisors is an integer number (103715832).

Almost surely, 2^1605053904 is an apocalyptic number.

It is an amenable number.

1605053904 is an abundant number, since it is smaller than the sum of its proper divisors (2543579376).

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

1605053904 is a wasteful number, since it uses less digits than its factorization.

1605053904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18107 (or 18101 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 33.

The square root of 1605053904 is about 40063.1239920204. The cubic root of 1605053904 is about 1170.8372763513.

Adding to 1605053904 its reverse (4093505061), we get a palindrome (5698558965).

The spelling of 1605053904 in words is "one billion, six hundred five million, fifty-three thousand, nine hundred four".