1604676385 has 16 divisors (see below), whose sum is σ = 2094276240. Its totient is φ = 1173254400.

The previous prime is 1604676379. The next prime is 1604676391. The reversal of 1604676385 is 5836764061.

It is an interprime number because it is at equal distance from previous prime (1604676379) and next prime (1604676391).

It can be written as a sum of positive squares in 8 ways, for example, as 37466641 + 1567209744 = 6121^2 + 39588^2 .

It is not a de Polignac number, because 1604676385 - 2¹⁹ = 1604152097 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 115650 + ... + 128779.

It is an arithmetic number, because the mean of its divisors is an integer number (130892265).

Almost surely, 2^1604676385 is an apocalyptic number.

It is an amenable number.

1604676385 is a deficient number, since it is larger than the sum of its proper divisors (489599855).

1604676385 is a wasteful number, since it uses less digits than its factorization.

1604676385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244548.

The product of its (nonzero) digits is 725760, while the sum is 46.

The square root of 1604676385 is about 40058.4121627405. The cubic root of 1604676385 is about 1170.7454730011.

It can be divided in two parts, 1604676 and 385, that added together give a palindrome (1605061).

The spelling of 1604676385 in words is "one billion, six hundred four million, six hundred seventy-six thousand, three hundred eighty-five".