687782312 has 16 divisors (see below), whose sum is σ = 1473819360. Its totient is φ = 294763824.

The previous prime is 687782287. The next prime is 687782341. The reversal of 687782312 is 213287786.

It is a happy number.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6140858 + ... + 6140969.

It is an arithmetic number, because the mean of its divisors is an integer number (92113710).

Almost surely, 2^687782312 is an apocalyptic number.

It is an amenable number.

687782312 is an abundant number, since it is smaller than the sum of its proper divisors (786037048).

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

687782312 is a wasteful number, since it uses less digits than its factorization.

687782312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12281840 (or 12281836 counting only the distinct ones).

The product of its digits is 225792, while the sum is 44.

The square root of 687782312 is about 26225.6041303151. The cubic root of 687782312 is about 882.7078745356.

The spelling of 687782312 in words is "six hundred eighty-seven million, seven hundred eighty-two thousand, three hundred twelve".