687871286 has 16 divisors (see below), whose sum is σ = 1044935424. Its totient is φ = 339579624.

The previous prime is 687871241. The next prime is 687871313. The reversal of 687871286 is 682178786.

It is a happy number.

It is a super-2 number, since 2×687871286² = 946333812206587592, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66671 + ... + 76293.

It is an arithmetic number, because the mean of its divisors is an integer number (65308464).

Almost surely, 2^687871286 is an apocalyptic number.

687871286 is a deficient number, since it is larger than the sum of its proper divisors (357064138).

687871286 is a wasteful number, since it uses less digits than its factorization.

687871286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10075.

The product of its digits is 1806336, while the sum is 53.

The square root of 687871286 is about 26227.3003948176. The cubic root of 687871286 is about 882.7459363190.

The spelling of 687871286 in words is "six hundred eighty-seven million, eight hundred seventy-one thousand, two hundred eighty-six".