687340808 has 64 divisors (see below), whose sum is σ = 1691366400. Its totient is φ = 253696320.

The previous prime is 687340781. The next prime is 687340943. The reversal of 687340808 is 808043786.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (44).

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 15 ways as a sum of consecutive naturals, for example, 17660 + ... + 41067.

It is an arithmetic number, because the mean of its divisors is an integer number (26427600).

Almost surely, 2^687340808 is an apocalyptic number.

It is an amenable number.

687340808 is an abundant number, since it is smaller than the sum of its proper divisors (1004025592).

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

687340808 is a wasteful number, since it uses less digits than its factorization.

687340808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58770 (or 58766 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 44.

The square root of 687340808 is about 26217.1853561743. The cubic root of 687340808 is about 882.5189569715.

The spelling of 687340808 in words is "six hundred eighty-seven million, three hundred forty thousand, eight hundred eight".