687805344 has 120 divisors (see below), whose sum is σ = 2030767200. Its totient is φ = 228369024.

The previous prime is 687805337. The next prime is 687805373. The reversal of 687805344 is 443508786.

687805344 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 687805344.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1147957 + ... + 1148555.

It is an arithmetic number, because the mean of its divisors is an integer number (16923060).

Almost surely, 2^687805344 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 687805344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1015383600).

687805344 is an abundant number, since it is smaller than the sum of its proper divisors (1342961856).

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

687805344 is a wasteful number, since it uses less digits than its factorization.

687805344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1064 (or 1047 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The square root of 687805344 is about 26226.0432394976. The cubic root of 687805344 is about 882.7177276052.

The spelling of 687805344 in words is "six hundred eighty-seven million, eight hundred five thousand, three hundred forty-four".