686508352 has 28 divisors (see below), whose sum is σ = 1380960916. Its totient is φ = 338549760.

The previous prime is 686508349. The next prime is 686508359. The reversal of 686508352 is 253805686.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 330657856 + 355850496 = 18184^2 + 18864^2 .

It is a junction number, because it is equal to n+sod(n) for n = 686508299 and 686508308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686508359) 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, 68799 + ... + 78142.

Almost surely, 2^686508352 is an apocalyptic number.

It is an amenable number.

686508352 is an abundant number, since it is smaller than the sum of its proper divisors (694452564).

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

686508352 is a wasteful number, since it uses less digits than its factorization.

686508352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147026 (or 147016 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 43.

The square root of 686508352 is about 26201.3043950106. The cubic root of 686508352 is about 882.1625326282.

The spelling of 686508352 in words is "six hundred eighty-six million, five hundred eight thousand, three hundred fifty-two".