1604734864 has 40 divisors (see below), whose sum is σ = 3193367040. Its totient is φ = 780912000.

The previous prime is 1604734861. The next prime is 1604734877. The reversal of 1604734864 is 4684374061.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1604734864.

It is not an unprimeable number, because it can be changed into a prime (1604734861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86929 + ... + 103759.

It is an arithmetic number, because the mean of its divisors is an integer number (79834176).

Almost surely, 2^1604734864 is an apocalyptic number.

It is an amenable number.

1604734864 is a deficient number, since it is larger than the sum of its proper divisors (1588632176).

1604734864 is a wasteful number, since it uses less digits than its factorization.

1604734864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16999 (or 16993 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 43.

The square root of 1604734864 is about 40059.1420776831. The cubic root of 1604734864 is about 1170.7596946002.

The spelling of 1604734864 in words is "one billion, six hundred four million, seven hundred thirty-four thousand, eight hundred sixty-four".