1685711740 has 48 divisors (see below), whose sum is σ = 3593705472. Its totient is φ = 664105536.

The previous prime is 1685711723. The next prime is 1685711743. The reversal of 1685711740 is 471175861.

It is a junction number, because it is equal to n+sod(n) for n = 1685711693 and 1685711702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1685711743) 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, 607837 + ... + 610603.

It is an arithmetic number, because the mean of its divisors is an integer number (74868864).

Almost surely, 2^1685711740 is an apocalyptic number.

1685711740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1685711740 is an abundant number, since it is smaller than the sum of its proper divisors (1907993732).

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

1685711740 is a wasteful number, since it uses less digits than its factorization.

1685711740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3226 (or 3224 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 40.

The square root of 1685711740 is about 41057.4200358474. The cubic root of 1685711740 is about 1190.1300942912.

The spelling of 1685711740 in words is "one billion, six hundred eighty-five million, seven hundred eleven thousand, seven hundred forty".