686343424 has 36 divisors (see below), whose sum is σ = 1475398036. Its totient is φ = 316772352.

The previous prime is 686343421. The next prime is 686343443. The reversal of 686343424 is 424343686.

It can be written as a sum of positive squares in 2 ways, for example, as 429318400 + 257025024 = 20720^2 + 16032^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686343421) 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, 99789 + ... + 106444.

Almost surely, 2^686343424 is an apocalyptic number.

686343424 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

686343424 is an abundant number, since it is smaller than the sum of its proper divisors (789054612).

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

686343424 is a wasteful number, since it uses less digits than its factorization.

686343424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206262 (or 206248 counting only the distinct ones).

The product of its digits is 331776, while the sum is 40.

The square root of 686343424 is about 26198.1568817350. The cubic root of 686343424 is about 882.0918828662.

The spelling of 686343424 in words is "six hundred eighty-six million, three hundred forty-three thousand, four hundred twenty-four".