686248 has 8 divisors (see below), whose sum is σ = 1286730. Its totient is φ = 343120.

The previous prime is 686209. The next prime is 686267. The reversal of 686248 is 842686.

It can be written as a sum of positive squares in only one way, i.e., 438244 + 248004 = 662^2 + 498^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42883 + ... + 42898.

2⁶⁸⁶²⁴⁸ is an apocalyptic number.

It is an amenable number.

686248 is a deficient number, since it is larger than the sum of its proper divisors (600482).

686248 is a wasteful number, since it uses less digits than its factorization.

686248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85787 (or 85783 counting only the distinct ones).

The product of its digits is 18432, while the sum is 34.

The square root of 686248 is about 828.4008691449. The cubic root of 686248 is about 88.2051001176.

The spelling of 686248 in words is "six hundred eighty-six thousand, two hundred forty-eight".