686868104 has 32 divisors (see below), whose sum is σ = 1388052120. Its totient is φ = 316763136.

The previous prime is 686868101. The next prime is 686868131. The reversal of 686868104 is 401868686.

It can be written as a sum of positive squares in 4 ways, for example, as 607622500 + 79245604 = 24650^2 + 8902^2 .

It is not an unprimeable number, because it can be changed into a prime (686868101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211904 + ... + 215120.

Almost surely, 2^686868104 is an apocalyptic number.

It is an amenable number.

686868104 is an abundant number, since it is smaller than the sum of its proper divisors (701184016).

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

686868104 is a wasteful number, since it uses less digits than its factorization.

686868104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5289 (or 5285 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 47.

The square root of 686868104 is about 26208.1686502510. The cubic root of 686868104 is about 882.3165993705.

The spelling of 686868104 in words is "six hundred eighty-six million, eight hundred sixty-eight thousand, one hundred four".