1685738688 has 56 divisors (see below), whose sum is σ = 4468703280. Its totient is φ = 560839680.

The previous prime is 1685738647. The next prime is 1685738731. The reversal of 1685738688 is 8868375861.

It is a super-2 number, since 2×1685738688² = 5683429848439922688, which contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 95758 + ... + 111986.

Almost surely, 2^1685738688 is an apocalyptic number.

It is an amenable number.

1685738688 is an abundant number, since it is smaller than the sum of its proper divisors (2782964592).

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

1685738688 is a wasteful number, since it uses less digits than its factorization.

1685738688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16785 (or 16775 counting only the distinct ones).

The product of its digits is 15482880, while the sum is 60.

The square root of 1685738688 is about 41057.7482090774. The cubic root of 1685738688 is about 1190.1364361139.

The spelling of 1685738688 in words is "one billion, six hundred eighty-five million, seven hundred thirty-eight thousand, six hundred eighty-eight".