687043168 has 72 divisors (see below), whose sum is σ = 1642282992. Its totient is φ = 277100544.

The previous prime is 687043163. The next prime is 687043169. The reversal of 687043168 is 861340786.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687043163) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59430 + ... + 70042.

It is an arithmetic number, because the mean of its divisors is an integer number (22809486).

Almost surely, 2^687043168 is an apocalyptic number.

687043168 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 687043168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (821141496).

687043168 is an abundant number, since it is smaller than the sum of its proper divisors (955239824).

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

687043168 is a wasteful number, since it uses less digits than its factorization.

687043168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10664 (or 10639 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 687043168 is about 26211.5083121899. The cubic root of 687043168 is about 882.3915525050.

The spelling of 687043168 in words is "six hundred eighty-seven million, forty-three thousand, one hundred sixty-eight".