1685873808 has 30 divisors (see below), whose sum is σ = 4718105574. Its totient is φ = 561957888.

The previous prime is 1685873801. The next prime is 1685873863. The reversal of 1685873808 is 8083785861.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1540719504 + 145154304 = 39252^2 + 12048^2 .

It is not an unprimeable number, because it can be changed into a prime (1685873801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5853585 + ... + 5853872.

Almost surely, 2^1685873808 is an apocalyptic number.

1685873808 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1685873808 is an abundant number, since it is smaller than the sum of its proper divisors (3032231766).

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

1685873808 is a wasteful number, since it uses less digits than its factorization.

1685873808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11707471 (or 11707462 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 54.

The square root of 1685873808 is about 41059.3936633263. The cubic root of 1685873808 is about 1190.1682336358.

The spelling of 1685873808 in words is "one billion, six hundred eighty-five million, eight hundred seventy-three thousand, eight hundred eight".