1604224660 has 24 divisors (see below), whose sum is σ = 3375753696. Its totient is φ = 640379040.

The previous prime is 1604224649. The next prime is 1604224667. The reversal of 1604224660 is 664224061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1604224667) 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 7 ways as a sum of consecutive naturals, for example, 71862 + ... + 91501.

It is an arithmetic number, because the mean of its divisors is an integer number (140656404).

Almost surely, 2^1604224660 is an apocalyptic number.

1604224660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1604224660 is an abundant number, since it is smaller than the sum of its proper divisors (1771529036).

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

1604224660 is a wasteful number, since it uses less digits than its factorization.

1604224660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163863 (or 163861 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 1604224660 is about 40052.7734370543. The cubic root of 1604224660 is about 1170.6356056499.

The spelling of 1604224660 in words is "one billion, six hundred four million, two hundred twenty-four thousand, six hundred sixty".