687443712 has 72 divisors (see below), whose sum is σ = 1925938560. Its totient is φ = 217082880.

The previous prime is 687443681. The next prime is 687443719. The reversal of 687443712 is 217344786.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687443719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8964 + ... + 38147.

Almost surely, 2^687443712 is an apocalyptic number.

It is an amenable number.

687443712 is an abundant number, since it is smaller than the sum of its proper divisors (1238494848).

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

687443712 is a wasteful number, since it uses less digits than its factorization.

687443712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47149 (or 47135 counting only the distinct ones).

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

The square root of 687443712 is about 26219.1478122383. The cubic root of 687443712 is about 882.5629963563.

The spelling of 687443712 in words is "six hundred eighty-seven million, four hundred forty-three thousand, seven hundred twelve".