687196340 has 24 divisors (see below), whose sum is σ = 1448049960. Its totient is φ = 273938048.

The previous prime is 687196339. The next prime is 687196381. The reversal of 687196340 is 43691786.

687196340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 373339684 + 313856656 = 19322^2 + 17716^2 .

It is a junction number, because it is equal to n+sod(n) for n = 687196291 and 687196300.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52775 + ... + 64494.

It is an arithmetic number, because the mean of its divisors is an integer number (60335415).

Almost surely, 2^687196340 is an apocalyptic number.

It is an amenable number.

687196340 is an abundant number, since it is smaller than the sum of its proper divisors (760853620).

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

687196340 is a wasteful number, since it uses less digits than its factorization.

687196340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117571 (or 117569 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 687196340 is about 26214.4299957104. The cubic root of 687196340 is about 882.4571222015.

The spelling of 687196340 in words is "six hundred eighty-seven million, one hundred ninety-six thousand, three hundred forty".