1604423028 has 48 divisors (see below), whose sum is σ = 4170660480. Its totient is φ = 476644224.

The previous prime is 1604423027. The next prime is 1604423047. The reversal of 1604423028 is 8203244061.

It is a junction number, because it is equal to n+sod(n) for n = 1604422986 and 1604423004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1604423021) 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 15 ways as a sum of consecutive naturals, for example, 172800 + ... + 181847.

It is an arithmetic number, because the mean of its divisors is an integer number (86888760).

Almost surely, 2^1604423028 is an apocalyptic number.

It is an amenable number.

1604423028 is an abundant number, since it is smaller than the sum of its proper divisors (2566237452).

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

1604423028 is a wasteful number, since it uses less digits than its factorization.

1604423028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354696 (or 354694 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 1604423028 is about 40055.2496933923. The cubic root of 1604423028 is about 1170.6838547260.

Adding to 1604423028 its reverse (8203244061), we get a palindrome (9807667089).

The spelling of 1604423028 in words is "one billion, six hundred four million, four hundred twenty-three thousand, twenty-eight".