687008500 has 48 divisors (see below), whose sum is σ = 1504640592. Its totient is φ = 274032000.

The previous prime is 687008467. The next prime is 687008503. The reversal of 687008500 is 5800786.

It can be written as a sum of positive squares in 8 ways, for example, as 272316004 + 414692496 = 16502^2 + 20364^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687008503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 196770 + ... + 200230.

It is an arithmetic number, because the mean of its divisors is an integer number (31346679).

Almost surely, 2^687008500 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 687008500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (752320296).

687008500 is an abundant number, since it is smaller than the sum of its proper divisors (817632092).

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

687008500 is a wasteful number, since it uses less digits than its factorization.

687008500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3877 (or 3865 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 687008500 is about 26210.8469912744. The cubic root of 687008500 is about 882.3767105144.

The spelling of 687008500 in words is "six hundred eighty-seven million, eight thousand, five hundred".