687571340 has 12 divisors (see below), whose sum is σ = 1443899856. Its totient is φ = 275028528.

The previous prime is 687571303. The next prime is 687571343. The reversal of 687571340 is 43175786.

It is not an unprimeable number, because it can be changed into a prime (687571343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17189264 + ... + 17189303.

It is an arithmetic number, because the mean of its divisors is an integer number (120324988).

Almost surely, 2^687571340 is an apocalyptic number.

It is an amenable number.

687571340 is an abundant number, since it is smaller than the sum of its proper divisors (756328516).

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

687571340 is a wasteful number, since it uses less digits than its factorization.

687571340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34378576 (or 34378574 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 41.

The square root of 687571340 is about 26221.5815693867. The cubic root of 687571340 is about 882.6176106605.

The spelling of 687571340 in words is "six hundred eighty-seven million, five hundred seventy-one thousand, three hundred forty".