1604225236 has 12 divisors (see below), whose sum is σ = 2807917812. Its totient is φ = 801963008.

The previous prime is 1604225177. The next prime is 1604225237. The reversal of 1604225236 is 6325224061.

It can be written as a sum of positive squares in 2 ways, for example, as 633528900 + 970696336 = 25170^2 + 31156^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1604225198 and 1604225207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1604225237) 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 3 ways as a sum of consecutive naturals, for example, 11245 + ... + 57748.

It is an arithmetic number, because the mean of its divisors is an integer number (233993151).

Almost surely, 2^1604225236 is an apocalyptic number.

It is an amenable number.

1604225236 is a deficient number, since it is larger than the sum of its proper divisors (1203692576).

1604225236 is a wasteful number, since it uses less digits than its factorization.

1604225236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74810 (or 74808 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 1604225236 is about 40052.7806275669. The cubic root of 1604225236 is about 1170.6357457562.

Adding to 1604225236 its reverse (6325224061), we get a palindrome (7929449297).

The spelling of 1604225236 in words is "one billion, six hundred four million, two hundred twenty-five thousand, two hundred thirty-six".