686482688 has 18 divisors (see below), whose sum is σ = 1370284314. Its totient is φ = 343241216.

The previous prime is 686482681. The next prime is 686482691. The reversal of 686482688 is 886284686.

It can be written as a sum of positive squares in only one way, i.e., 682672384 + 3810304 = 26128^2 + 1952^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686482681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1340531 + ... + 1341042.

Almost surely, 2^686482688 is an apocalyptic number.

It is an amenable number.

686482688 is a deficient number, since it is larger than the sum of its proper divisors (683801626).

686482688 is an equidigital number, since it uses as much as digits as its factorization.

686482688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2681589 (or 2681575 counting only the distinct ones).

The product of its digits is 7077888, while the sum is 56.

The square root of 686482688 is about 26200.8146438236. The cubic root of 686482688 is about 882.1515397532.

The spelling of 686482688 in words is "six hundred eighty-six million, four hundred eighty-two thousand, six hundred eighty-eight".