1604216660 has 48 divisors (see below), whose sum is σ = 3432979200. Its totient is φ = 629576064.

The previous prime is 1604216651. The next prime is 1604216689. The reversal of 1604216660 is 666124061.

It is a super-2 number, since 2×1604216660² = 5147022184443111200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 254426 + ... + 260654.

It is an arithmetic number, because the mean of its divisors is an integer number (71520400).

Almost surely, 2^1604216660 is an apocalyptic number.

1604216660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1604216660 is an abundant number, since it is smaller than the sum of its proper divisors (1828762540).

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

1604216660 is a wasteful number, since it uses less digits than its factorization.

1604216660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6480 (or 6478 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 1604216660 is about 40052.6735686895. The cubic root of 1604216660 is about 1170.6336597253.

The spelling of 1604216660 in words is "one billion, six hundred four million, two hundred sixteen thousand, six hundred sixty".