1604608 has 22 divisors (see below), whose sum is σ = 3209696. Its totient is φ = 801792.

The previous prime is 1604597. The next prime is 1604609. The reversal of 1604608 is 8064061.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1604609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 241 + ... + 1807.

2^1604608 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1604608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1604848).

1604608 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1604608 is an equidigital number, since it uses as much as digits as its factorization.

1604608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1587 (or 1569 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 1604608 is about 1266.7312264249. The cubic root of 1604608 is about 117.0728841908.

Adding to 1604608 its reverse (8064061), we get a palindrome (9668669).

The spelling of 1604608 in words is "one million, six hundred four thousand, six hundred eight".