687305088 has 192 divisors, whose sum is σ = 2160849600. Its totient is φ = 216857088.

The previous prime is 687305083. The next prime is 687305089. The reversal of 687305088 is 880503786.

It is a tau number, because it is divible by the number of its divisors (192).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687305083) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 590395 + ... + 591557.

It is an arithmetic number, because the mean of its divisors is an integer number (11254425).

Almost surely, 2^687305088 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 687305088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1080424800).

687305088 is an abundant number, since it is smaller than the sum of its proper divisors (1473544512).

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

687305088 is a wasteful number, since it uses less digits than its factorization.

687305088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1211 (or 1187 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The square root of 687305088 is about 26216.5041147747. The cubic root of 687305088 is about 882.5036690081.

The spelling of 687305088 in words is "six hundred eighty-seven million, three hundred five thousand, eighty-eight".