686448522 has 12 divisors (see below), whose sum is σ = 1487305170. Its totient is φ = 228816168.

The previous prime is 686448487. The next prime is 686448541. The reversal of 686448522 is 225844686.

686448522 is a `hidden beast` number, since 6 + 86 + 4 + 48 + 522 = 666.

It can be written as a sum of positive squares in only one way, i.e., 398840841 + 287607681 = 19971^2 + 16959^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19067997 + ... + 19068032.

Almost surely, 2^686448522 is an apocalyptic number.

686448522 is an abundant number, since it is smaller than the sum of its proper divisors (800856648).

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

686448522 is a wasteful number, since it uses less digits than its factorization.

686448522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38136037 (or 38136034 counting only the distinct ones).

The product of its digits is 737280, while the sum is 45.

The square root of 686448522 is about 26200.1626330830. The cubic root of 686448522 is about 882.1369047206.

The spelling of 686448522 in words is "six hundred eighty-six million, four hundred forty-eight thousand, five hundred twenty-two".