1604324436 has 72 divisors (see below), whose sum is σ = 4422093984. Its totient is φ = 448755840.

The previous prime is 1604324377. The next prime is 1604324437. The reversal of 1604324436 is 6344234061.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 1604324397 and 1604324406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1604324437) 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 23 ways as a sum of consecutive naturals, for example, 13651 + ... + 58266.

It is an arithmetic number, because the mean of its divisors is an integer number (61417972).

Almost surely, 2^1604324436 is an apocalyptic number.

It is an amenable number.

1604324436 is an abundant number, since it is smaller than the sum of its proper divisors (2817769548).

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

1604324436 is a wasteful number, since it uses less digits than its factorization.

1604324436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71961 (or 71946 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 33.

The square root of 1604324436 is about 40054.0189743801. The cubic root of 1604324436 is about 1170.6598746773.

Adding to 1604324436 its reverse (6344234061), we get a palindrome (7948558497).

It can be divided in two parts, 16043244 and 36, that added together give a triangular number (16043280 = T₅₆₆₄).

The spelling of 1604324436 in words is "one billion, six hundred four million, three hundred twenty-four thousand, four hundred thirty-six".