687379518 has 96 divisors (see below), whose sum is σ = 1837555200. Its totient is φ = 181355328.

The previous prime is 687379501. The next prime is 687379519. The reversal of 687379518 is 815973786.

687379518 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687379519) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 79953 + ... + 88131.

It is an arithmetic number, because the mean of its divisors is an integer number (19141200).

Almost surely, 2^687379518 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 687379518, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (918777600).

687379518 is an abundant number, since it is smaller than the sum of its proper divisors (1150175682).

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

687379518 is a wasteful number, since it uses less digits than its factorization.

687379518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8246 (or 8243 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 54.

The square root of 687379518 is about 26217.9236019941. The cubic root of 687379518 is about 882.5355240403.

The spelling of 687379518 in words is "six hundred eighty-seven million, three hundred seventy-nine thousand, five hundred eighteen".