1608985660 has 48 divisors (see below), whose sum is σ = 3476281536. Its totient is φ = 625277952.

The previous prime is 1608985603. The next prime is 1608985661. The reversal of 1608985660 is 665898061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1608985661) by changing a digit.

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, 101812 + ... + 116548.

It is an arithmetic number, because the mean of its divisors is an integer number (72422532).

Almost surely, 2^1608985660 is an apocalyptic number.

1608985660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1608985660 is an abundant number, since it is smaller than the sum of its proper divisors (1867295876).

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

1608985660 is a wasteful number, since it uses less digits than its factorization.

1608985660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14902 (or 14900 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 49.

The square root of 1608985660 is about 40112.1634918886. The cubic root of 1608985660 is about 1171.7925283212.

The spelling of 1608985660 in words is "one billion, six hundred eight million, nine hundred eighty-five thousand, six hundred sixty".