1687668112 has 20 divisors (see below), whose sum is σ = 3521384860. Its totient is φ = 778923648.

The previous prime is 1687668053. The next prime is 1687668131. The reversal of 1687668112 is 2118667861.

It can be written as a sum of positive squares in 2 ways, for example, as 269091216 + 1418576896 = 16404^2 + 37664^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4056687 + ... + 4057102.

It is an arithmetic number, because the mean of its divisors is an integer number (176069243).

Almost surely, 2^1687668112 is an apocalyptic number.

It is an amenable number.

1687668112 is an abundant number, since it is smaller than the sum of its proper divisors (1833716748).

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

1687668112 is a wasteful number, since it uses less digits than its factorization.

1687668112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8113810 (or 8113804 counting only the distinct ones).

The product of its digits is 193536, while the sum is 46.

The square root of 1687668112 is about 41081.2379560305. The cubic root of 1687668112 is about 1190.5903226509.

The spelling of 1687668112 in words is "one billion, six hundred eighty-seven million, six hundred sixty-eight thousand, one hundred twelve".