687712344 has 64 divisors (see below), whose sum is σ = 1877904000. Its totient is φ = 208139520.

The previous prime is 687712343. The next prime is 687712367. The reversal of 687712344 is 443217786.

687712344 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 687712296 and 687712305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687712343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 423967 + ... + 425585.

It is an arithmetic number, because the mean of its divisors is an integer number (29342250).

Almost surely, 2^687712344 is an apocalyptic number.

It is an amenable number.

687712344 is an abundant number, since it is smaller than the sum of its proper divisors (1190191656).

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

687712344 is a wasteful number, since it uses less digits than its factorization.

687712344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3248 (or 3244 counting only the distinct ones).

The product of its digits is 225792, while the sum is 42.

The square root of 687712344 is about 26224.2701328369. The cubic root of 687712344 is about 882.6779409370.

The spelling of 687712344 in words is "six hundred eighty-seven million, seven hundred twelve thousand, three hundred forty-four".